Android 常用API自查表（一）

文章目录

编译错误
Kapt编译加速
Android12 广播Intent为空
帧率测试
文字自适应
字符串拼接
Retrofit Json异常解决
图片状态选择器
Cmake文档
Android 10 已授权仍提示无读写权限
文本缩略
文本描边
gradle 下载
图片换色
圆角
ScollerView自动滚动
ScollerView EditText自动滚动
系统级定时器
Java非空检查
公共头布局
Canvas保存图片
返回键
打LOG
申请权限
依赖
gradle 重复依赖
AAR 引入
AAR 修改输出名称
Dialog
dp,px互转
刷新媒体库
修改状态栏颜色
- 修改字体颜色
- 显示隐藏状态栏
布局边框 outlineProvider
FragmentPagerAdapter 加载
TextView 设置 Drawable
拍照快门声
toJsonTree
输出堆栈
LIstView
验证并初始化GLS
List 嵌套
SpannerString
防抖动

编译错误

Caused by: org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed; see the compiler error output for details.

Kapt编译加速

https://www.kotlincn.net/docs/reference/kapt.html

Android12 广播Intent为空

Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
解决
PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_MUTABLE

帧率测试

    private long callbackNum = 0;private long currentTime = 0L;private long previewTime = 0L;private long dltaTimeSum = 0L;/** 测试频率* 注释：* @author maqi* created at 2021/11/8 16:48* */private void testCallHz() {currentTime = System.currentTimeMillis();dltaTimeSum += (currentTime - previewTime);callbackNum++;if (callbackNum % 100 == 0) {Log.d("testCallHz", "一百次平均时长 " + (dltaTimeSum / callbackNum));callbackNum = 0;dltaTimeSum = 0;}previewTime = currentTime;}

文字自适应

@Overridepublic void onWindowFocusChanged(boolean hasFocus) {super.onWindowFocusChanged(hasFocus);if (hasFocus) {setTvSize(mainGuideTv, mMainGuide.getMeasuredWidth() - dp2px(this, 20), new TextPaint());}}/** 文字自动缩放* 注释：* @author maqi* created at 2022/8/4 16:44* */private void setTvSize(TextView textView, int width, TextPaint textPaint) {int textSizeDp = px2dip(this, textView.getTextSize());String text = textView.getText().toString();textPaint.setTextSize(dp2px(this, textSizeDp));float textwidth = textPaint.measureText(text);if (textwidth > width) {textSizeDp--;textView.setTextSize(textSizeDp);setTvSize(textView, width, textPaint);}}public static int dp2px(Context context, float dpVal) {return (int) TypedValue.applyDimension(1, dpVal, context.getResources().getDisplayMetrics());}public static int px2dip(Context context, float pxValue) {float scale = context.getResources().getDisplayMetrics().density;return (int) (pxValue / scale + 0.5f);}

字符串拼接

<string name="lock_after_timeout_summary_with_exception" msgid="5579064842797188409">"休眠<xliff:g id="TIMEOUT_STRING">%1$s</xliff:g>后（<xliff:g id="TRUST_AGENT_NAME">%2$s</xliff:g>让屏幕保持解锁状态时除外）"</string>

Retrofit Json异常解决

java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT

//public List<ListBean> list;class ListBean {}public Object list;public List<ListBean> getList() {try {Gson gson = new Gson();if (list != null) {String json = gson.toJson(list);TypeToken<List<ListBean>> typeToken = new TypeToken<List<ListBean>>() {};return gson.fromJson(json, typeToken.getType());}} catch (Exception e) {Log.d("xxxxx", e.getLocalizedMessage());}return new ArrayList<>();
}

图片状态选择器

//TextView
android:drawableTint="@color/select_text_color"//ImageView
fun ImageView.setSelector(context: Context, drawable_res: Int, color_res: Int) {val icon = ContextCompat.getDrawable(context, drawable_res)val tintIcon = DrawableCompat.wrap(icon!!)val selector_tint = ContextCompat.getColorStateList(context, color_res)DrawableCompat.setTintList(tintIcon, selector_tint)setImageDrawable(tintIcon)
}

Cmake文档

https://developer.android.com/studio/projects/configure-cmake

Android 10 已授权仍提示无读写权限

android:requestLegacyExternalStorage="true"

文本缩略

Paint  paintCenterText = new Paint();
paintCenterText.setColor(textColorCenter);
paintCenterText.setAntiAlias(true);
paintCenterText.setTextScaleX(textScaleX);
paintCenterText.setTypeface(Typeface.MONOSPACE);
paintCenterText.setTextSize(textSize);
String info = TextUtils.ellipsize(contentTexts[i],
new TextPaint(paintCenterText), 300, TextUtils.TruncateAt.END).toString();

文本描边

userTextP?.setShadowLayer(1f, 1f, 1f, Color.parseColor("#FFFFFFFF"));

gradle 下载

https://gradle.org/releases/

图片换色

int textColor = ContextCompat.getColor(requireContext(), R.color.app_color);
mTvPing.setTextColor(textColor);
Drawable d1 = getResources().getDrawable(R.drawable.ic_heart).mutate();
d1.setBounds(0, 0, d1.getMinimumWidth(), d1.getMinimumHeight());
d1.setColorFilter(textColor, PorterDuff.Mode.SRC_ATOP);
mTvPing.setCompoundDrawables(d1, null, null, null);

圆角

final GradientDrawable drawable = new GradientDrawable();drawable.setColor(0xff308EFF);mBtnHomepage.setBackgroundDrawable(drawable);mBtnHomepage.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {@Overridepublic void onGlobalLayout() {drawable.setCornerRadius(mBtnHomepage.getHeight() / 2);}});


/*** 文件名：RoundImageView* 描  述：* 作  者：05878mq* 时  间：2022/9/7 17:11*/
public class RoundImageView extends AppCompatImageView {private final static int mBorderRadius = 20;private Paint mPaint;private Xfermode mXfermode;public RoundImageView(Context context) {this(context, null);}public RoundImageView(Context context, AttributeSet attrs) {this(context, attrs, 0);}public RoundImageView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);mPaint = new Paint();mPaint.setAntiAlias(true);mXfermode = new PorterDuffXfermode(PorterDuff.Mode.SRC_IN);}@Overrideprotected void onDraw(Canvas canvas) {if (getDrawable() == null) {return;}float mBorderRadiusDp = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, mBorderRadius, getResources().getDisplayMetrics());int sc = canvas.saveLayer(0, 0, getWidth(), getHeight(), null, Canvas.ALL_SAVE_FLAG);//画源图像，为一个圆角矩形canvas.drawRoundRect(new RectF(0, 0, getWidth(), getHeight()), mBorderRadiusDp, mBorderRadiusDp,mPaint);//设置混合模式mPaint.setXfermode(mXfermode);//画目标图像canvas.drawBitmap(drawableToBitamp(getDrawable()), 0, 0, mPaint);// 还原混合模式mPaint.setXfermode(null);canvas.restoreToCount(sc);}/*** 图片拉升** @param drawable* @return*/private Bitmap drawableToBitamp(Drawable drawable) {float scale = Math.max(getWidth() * 1.0f / drawable.getIntrinsicWidth(), getHeight()* 1.0f / drawable.getIntrinsicHeight());int w = (int) (drawable.getIntrinsicWidth() * scale);int h = (int) (drawable.getIntrinsicWidth() * scale);Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);Canvas canvas = new Canvas(bitmap);drawable.setBounds(0, 0, w, h);drawable.draw(canvas);return bitmap;}
}

ScollerView自动滚动

android:focusable="true"
android:focusableInTouchMode="true"

ScollerView EditText自动滚动

public class NoScollerEditText extends AppCompatEditText implements View.OnTouchListener {public NoScollerEditText(Context context) {this(context, null);}public NoScollerEditText(Context context, AttributeSet attrs) {this(context, attrs, 0);}public NoScollerEditText(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);setOnTouchListener(this);}@Overridepublic boolean onTouch(View view, MotionEvent motionEvent) {//这句话说的意思告诉父View我自己的事件我自己处理view.requestFocusFromTouch();return false;}
}

系统级定时器

Intent mStartActivity = new Intent(MainActivity.this, MainActivity.class);
int mPendingIntentId = 123456;
PendingIntent mPendingIntent = PendingIntent.getActivity(MainActivity.this,mPendingIntentId,mStartActivity,PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager mgr = (AlarmManager) MainActivity.this.getSystemService(Context.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 100, mPendingIntent);
System.exit(0);

Java非空检查

 Objects.requireNonNull

公共头布局

//activity 中@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {menu.clear();View view = LayoutInflater.from(this).inflate(R.layout.menu_header, null);((TextView) view.findViewById(R.id.menu_title)).setText(R.string.portfolio);view.findViewById(R.id.add_portfolio).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {}});view.findViewById(R.id.menu_back).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {finish();}});ActionBar supportActionBar = getActivity().getSupportActionBar();supportActionBar.setDisplayShowCustomEnabled(true);supportActionBar.setHomeButtonEnabled(false);supportActionBar.setDisplayHomeAsUpEnabled(false);supportActionBar.setCustomView(view);return super.onPrepareOptionsMenu(menu);}//header.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="50dp"android:background="@color/app_color"android:gravity="center_vertical"android:orientation="horizontal"><FrameLayoutandroid:id="@+id/menu_back"android:layout_width="@dimen/dp_50"android:layout_height="@dimen/dp_50"><ImageViewandroid:layout_width="@dimen/dp_25"android:layout_height="@dimen/dp_25"android:layout_gravity="center"android:src="@drawable/ic_back"></ImageView></FrameLayout><TextViewandroid:id="@+id/menu_title"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerInParent="true"android:textColor="#ffffffff"android:textSize="17sp"></TextView></RelativeLayout>

Canvas保存图片

//bitmap为被绘制的图形，而mIfrBitmap为底图
Paint p = Paint() // 创建一个画笔对象
Matrix mMatrix = Matrix()
mMatrix.setScale(1.0f, 1.0f)
//val mIfrBitmap = bitmap.copy(Bitmap.Config.ARGB_8888, true)
//saveCanvas.drawBitmap(mIfrBitmap, mMatrix, p)
Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888).also {drawBoxs(Canvas(it).apply { drawBitmap(bitmap, mMatrix, p) })FileUtils.saveBitmap2JpegFile(it, "${System.currentTimeMillis()}_oragin.png");
}

drawBoxs

private fun drawBoxs(mCanvas: Canvas?) {val userTextP = TextPaint() // 创建一个画笔对象var mScale: Float = 1fval WIDTH  =0Lval WIDTH  =0Lvar x = 0var y = 0userTextWidth = density * 150 + 0.5fuserTextHeight = density * 16 + 0.5fuserTextP?.style = Paint.Style.FILLuserTextP?.color = Color.parseColor("#FF000000")userTextP?.isFakeBoldText = true;userTextP?.strokeWidth = textSize.toFloat();userTextP?.setShadowLayer(1f, 1f, 1f, Color.parseColor("#FF000000"));userTextP?.textSize = userTextHeight// - textSize//userTextP?.color = Color.parseColor("#FF56FED4")//mCanvas?.drawText(String.format(mCtx!!.getString(R.string.foramt_human_box), box.distance / 100f, box.angle / 100), x * mScale, y * mScale + userTextHeight, userTextP!!)val format =""mCanvas?.save()val myStaticLayout = StaticLayout(format, userTextP, userTextWidth.toInt(), Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, true)/*判断 是否 超出*/val overWidth: Float = with(WIDTH * mScale - (x * mScale + userTextWidth)) { if (this >= 0) 0f else this }var overHeight: Float = with(y * mScale - myStaticLayout.height) { if (this >= 0) this else 0f }mCanvas?.translate(x * mScale + overWidth, overHeight)myStaticLayout.draw(mCanvas)mCanvas?.restore()
}

保存bitmap

    public static boolean saveBitmap2JpegFile(Bitmap bmp, String bitName)  {boolean flag = false;if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {// 获得存储卡的路径String sdpath = Environment.getExternalStorageDirectory() + "/";String mSavePath = sdpath + "Meidi/imgs";new File(mSavePath).mkdirs();File f = new File(mSavePath, bitName);try {f.createNewFile();} catch (IOException e) {e.printStackTrace();}FileOutputStream fOut = null;try {fOut = new FileOutputStream(f);bmp.compress(Bitmap.CompressFormat.PNG, 100, fOut);flag = true;} catch (FileNotFoundException e) {e.printStackTrace();}try {fOut.flush();} catch (IOException e) {e.printStackTrace();}try {fOut.close();} catch (IOException e) {e.printStackTrace();}}return flag;}

返回键

 private val TIME_INTERVAL = 2000private var mBackPressed: Long = 0override fun onBackPressed() {if (mBackPressed + TIME_INTERVAL > System.currentTimeMillis()) {super.onBackPressed()return} else {Toast.makeText(baseContext, "再次点击返回键退出", Toast.LENGTH_SHORT).show()}mBackPressed = System.currentTimeMillis()}

打LOG

public class Logger {/*** ERROR*/public static void e(Class<?> clazz, String msg) {if (BuildConfig.DEBUG) {Log.e(clazz.getSimpleName(), msg + "");}}public static void e(String tag, String msg) {if (BuildConfig.DEBUG) {Log.e(tag, msg + "");}}/*** WARN*/public static void w(Class<?> clazz, String msg) {if (BuildConfig.DEBUG) {Log.w(clazz.getSimpleName(), msg + "");}}public static void w(String tag, String msg) {if (BuildConfig.DEBUG) {Log.w(tag, msg + "");}}/*** INFO*/public static void i(Class<?> clazz, String msg) {if (BuildConfig.DEBUG) {Log.i(clazz.getSimpleName(), msg + "");}}public static void i(String tag, String msg) {if (BuildConfig.DEBUG) {Log.i(tag, msg + "");}}/*** DEBUG*/public static void d(Class<?> clazz, String msg) {if (BuildConfig.DEBUG) {Log.d(clazz.getSimpleName(), msg + "");}}public static void d(String tag, String msg) {if (BuildConfig.DEBUG) {Log.d(tag, msg + "");}}/*** VERBOSE*/public static void v(Class<?> clazz, String msg) {if (BuildConfig.DEBUG) {Log.v(clazz.getSimpleName(), msg + "");}}public static void v(String tag, String msg) {if (BuildConfig.DEBUG) {Log.v(tag, msg + "");}}}

申请权限

//android 7.0及以上需要动态申请权限
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 1);
}

依赖

gradle 重复依赖

compileOnly 'com.google.code.gson:gson:2.8.5'
configurations.all{ resolutionStrategy { force 'com.google.code.gson:gson:2.8.5' } }
configurations { // all*.exclude group: 'com.android.support', module: 'support-v13' all*.exclude group: 'com.android.support' }
gradlew :lib_expert:dependenciecls 导出依赖
推荐Gradle依赖--管理依赖的版本 https://www.jianshu.com/p/ee1477693d8e

AAR 引入

implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])

AAR 修改输出名称

apply plugin: 'com.android.library'
android{··libraryVariants.all { variant ->if (variant.buildType.name == "debug") {variant.getPackageLibrary().destinationDir = new File(project.rootDir.absolutePath + "/${project.name}/build/outputs/debug/aar")}/*旧版本无效*/
//        if (variant.buildType.name == 'release') {//            variant.outputs.all { output ->
//                println("outputFile    ${outputFile}")
//                println("outputFileName before    ${outputFileName}")
//                def outputFile = output.outputFile
//                if (outputFile != null && outputFile.name.endsWith('release.aar')) {//                    outputFileName = "tnn-${project.name}${variant.flavorName}-${variant.buildType.name}.aar"
//                    println("outputFileName  after   ${outputFileName}")
//                }
//            }
//        }if (variant.buildType.name == 'release') {//variant.getPackageLibrary().destinationDir = new File(project.rootDir.absolutePath + "/${project.name}/build/outputs/release/aar")variant.assemble.doLast {variant.outputs.all { output ->def outputFile = output.outputFileif (outputFile != null && outputFile.name.endsWith('release.aar')) {def date = new Date()def formattedDate = date.format('yyyy-MM-dd-HH-mm-ss')def fileName = "tnn${variant.flavorName}-${formattedDate}-${variant.buildType.name}"def outputPath = project.rootDir.absolutePath + "/${project.name}/build/outputs/release/aar"copy {from outputFileinto outputPathrename { fileName + ".aar" }}println("outputFile    ${outputFile}")println("outputFileName     ${outputFileName}")delete outputFile.parentFile}}}}}
}

Dialog

继承BaseDialog

import android.annotation.SuppressLint;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;public class BaseDialog extends Dialog {private static final String TAG = "BaseDialog";private Context context;private int layoutId;public View view;public BaseDialog(Context context) {super(context);init(context, 0);}public BaseDialog(Context context, int theme) {super(context, theme);init(context, 0);}public BaseDialog(Context context, int theme, int LayoutId) {super(context, theme);init(context, LayoutId);}private void init(Context context, int layoutId) {this.context = context;this.layoutId = layoutId;}@SuppressLint("InflateParams")@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);if (layoutId != 0) {view = LayoutInflater.from(context).inflate(layoutId, null);this.setContentView(view);}initView();}public void initView() {// 初始化默认的dialog，对于其他的可以复写这个方法来完成}public void setWidthHight(int dialogWidthDp, int dialogHightDp) {WindowManager.LayoutParams params = this.getWindow().getAttributes();params.width = dialogWidthDp;params.height = dialogHightDp;this.getWindow().setAttributes(params);}public void setPostion(int offx, int offy) {Window dialogWindow = this.getWindow();WindowManager.LayoutParams lp = dialogWindow.getAttributes();dialogWindow.setGravity(Gravity.CENTER);lp.x = offx;lp.y = offy;/*Resources re = context.getResources();lp.x = (int) re.getDimension(R.dimen.dialog_move_x);lp.y = (int) re.getDimension(R.dimen.dialog_move_y);*/dialogWindow.setAttributes(lp);}}

重写Dialog的状态栏
注意：高度不要写 WindowManager.LayoutParams.MATCH_PARENT,这样会覆盖Activity的状态栏，这样你的顶部一片白，且无法修改状态栏字体，此题误解。
尝试了2天发现只有Activity才能修改 状态栏字体颜色 于是给大家如下

 WindowManager.LayoutParams p = win.getAttributes(); // 获取对话框当前的参数值p.width = WindowManager.LayoutParams.MATCH_PARENT;p.height = ScreenUtils.Companion.getScreenHeight(mContext);//高度不占用状态栏p.flags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;//黑色字体win.setAttributes(p);

fun getScreenHeight(ctx: Context): Int {return ctx.resources.displayMetrics.heightPixels}fun getScreenWidth(ctx: Context): Int {return ctx.resources.displayMetrics.widthPixels}

写一个工具类

public void show() {AlertDialog.Builder builder = new AlertDialog.Builder(context, R.style.My_Theme_Dialog_Alert);alertDialog = builder.create();alertDialog.show();alertDialog.setCanceledOnTouchOutside(false);Window win = alertDialog.getWindow();win.setWindowAnimations(R.style.dialog_animation_style);LayoutInflater factory = LayoutInflater.from(context);final View view = factory.inflate(R.layout.dialog_download, null);win.setContentView(view);// 实现弹出软键盘win.clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);WindowManager.LayoutParams p = win.getAttributes(); // 获取对话框当前的参数值p.width = context.getResources().getDimensionPixelOffset(R.dimen.dialog_width);//WindowManager.LayoutParams p = win.getAttributes(); // 获取对话框当前的参数值//p.width = WindowManager.LayoutParams.MATCH_PARENT;//p.height = WindowManager.LayoutParams.MATCH_PARENT;win.setAttributes(p);
}

style

    <!-- 完全自定义的Dialog --><style name="My_Theme_Dialog_Alert" parent="@android:style/Theme"><item name="windowNoTitle">true</item><item name="android:windowBackground">@drawable/guide_dialog_background</item><item name="android:windowContentOverlay">@null</item><item name="android:backgroundDimEnabled">true</item><item name="android:windowSoftInputMode">adjustPan</item><item name="android:windowIsFloating">true</item></style>

Animation

 <style name="dialog_animation_style"><item name="android:windowEnterAnimation">@anim/anim_show_in</item><item name="android:windowExitAnimation">@anim/anim_show_out</item></style>

简单的loading

   val loadingAlertDialog: AlertDialog by lazy {AlertDialog.Builder(this, R.style.dialog_style).create().apply {val inflate = View.inflate(this@BaseActivity, R.layout.loading, null)setView(inflate)val imageView = inflate.findViewById<ImageView>(R.id.loading_view)val animationDrawable =ContextCompat.getDrawable(this@BaseActivity,R.drawable.anim_loading_view) as AnimationDrawableanimationDrawable.start()setCancelable(true)setCanceledOnTouchOutside(false)imageView.setImageDrawable(animationDrawable)}}

style

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"><ImageViewandroid:id="@+id/loading_view"android:layout_width="wrap_content"android:layout_height="wrap_content"android:background="@drawable/shape_black" />
</FrameLayout>
<!--背景-->
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"android:shape="rectangle"><corners android:radius="@dimen/margin_5dp"></corners><solid android:color="@color/black"></solid><size android:height="50dp" android:width="50dp"></size>
</shape><!--动画 anim_loading_view-->
<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" android:oneshot="false"><item android:drawable="@mipmap/refresh_loading01" android:duration="100" /><item android:drawable="@mipmap/refresh_loading02" android:duration="100" /><item android:drawable="@mipmap/refresh_loading03" android:duration="100" /><item android:drawable="@mipmap/refresh_loading04" android:duration="100" /><item android:drawable="@mipmap/refresh_loading05" android:duration="100" /><item android:drawable="@mipmap/refresh_loading06" android:duration="100" /><item android:drawable="@mipmap/refresh_loading07" android:duration="100" /><item android:drawable="@mipmap/refresh_loading08" android:duration="100" /><item android:drawable="@mipmap/refresh_loading09" android:duration="100" /><item android:drawable="@mipmap/refresh_loading10" android:duration="100" /><item android:drawable="@mipmap/refresh_loading11" android:duration="100" /><item android:drawable="@mipmap/refresh_loading12" android:duration="100" />
</animation-list>

图片链接

3 适用于全屏


public abstract class BaseDialog extends Dialog {public BaseDialog(@NonNull Context context, @StyleRes int themeResId) {super(context, themeResId);setCancelable(false);}public BaseDialog(@NonNull Context context) {this(context, R.style.DialogTheme);}protected abstract int getLayoutResId();protected abstract void onCreateView();public int getViewGravity() {return Gravity.CENTER;}public int getLayoutParamsWidth() {return WindowManager.LayoutParams.MATCH_PARENT;}public int getLayoutParamsHeight() {return WindowManager.LayoutParams.WRAP_CONTENT;}@Overridepublic final void setCancelable(boolean flag) {super.setCancelable(flag);}@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);Window window = getWindow();window.getDecorView().setPadding(0, 0, 0, 0);WindowManager.LayoutParams layoutParams = window.getAttributes();layoutParams.width = getLayoutParamsWidth();layoutParams.height = getLayoutParamsHeight();window.setAttributes(layoutParams);window.setGravity(getViewGravity());setContentView(getLayoutResId()); onCreateView();setCanceledOnTouchOutside(false);}
}

dp,px互转

   /*** 根据手机的分辨率从 dp 的单位 转成为 px(像素)*/public static int dip2px(Context context, float dpValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (dpValue * scale + 0.5f);}/*** 根据手机的分辨率从 px(像素) 的单位 转成为 dp*/public static int px2dip(Context context, float pxValue) {final float scale = context.getResources().getDisplayMetrics().density;return (int) (pxValue / scale + 0.5f);}

刷新媒体库


class MediaUtils {companion object {/*** 刷新media显示，使用MediaScannerConnection.scanFile会导致MediaScanner ServiceConnectionLeaked低概率错误，因此改用广播的方式* 2017.11.17改为scanFile，改成广播的方式会导致SD卡内容无法及时刷新** @param ctx* @param filePath*/fun noticeMediaScanner(ctx: Context, filePath: String?) {if (null == filePath) {return}MediaScannerConnection.scanFile(ctx,arrayOf(filePath), null) { _, _ -> }}}init {throw AssertionError("cannot be instantiated")}}

修改状态栏颜色

    fun initStatusBar() {var statusBarView: View? = nullif (statusBarView == null) {//利用反射机制修改状态栏背景val identifier = resources.getIdentifier("statusBarBackground", "id", "android")statusBarView = window.findViewById<View>(identifier)}if (statusBarView != null) {statusBarView.setBackgroundResource(R.drawable.top_bar_background)}}

修改字体颜色

 /*** 界面设置状态栏字体颜色*/fun changeStatusBarTextImgColor(isBlack: Boolean) {if (isBlack) {//设置状态栏黑色字体window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR} else {//恢复状态栏白色字体window.decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_VISIBLE}}

显示隐藏状态栏

    fun hideStatusBar() {window.decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
//                or View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
//                or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATIONor View.SYSTEM_UI_FLAG_FULLSCREENor View.SYSTEM_UI_FLAG_IMMERSIVE)if (Build.VERSION.SDK_INT < 30) {window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);window.clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);} else {val v = window.decorViewval uiOptions = (View.SYSTEM_UI_FLAG_HIDE_NAVIGATIONor View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY or View.SYSTEM_UI_FLAG_FULLSCREEN)v.setSystemUiVisibility(uiOptions)}}fun showStatusBar() {window.decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLEor View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATIONor View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN)}

布局边框 outlineProvider

 android:outlineProvider="bounds"

   ViewOutlineProvider viewOutlineProvider = new ViewOutlineProvider() {@Overridepublic void getOutline(View view, Outline outline) {outline.setOval(0,0,mImg.getWidth(), mImg.getHeight());}};mImg.setOutlineProvider(viewOutlineProvider);mImg.setClipToOutline(true);

FragmentPagerAdapter 加载


import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.view.ViewGroup;import com.proginn.base.BaseFragment;import java.util.List;public class BaseFragmentAdapter extends FragmentPagerAdapter {private List<BaseFragment> fragments;private String[] titles;private FragmentManager fm;public BaseFragmentAdapter(FragmentManager fm, List<BaseFragment> fragments, String[] titles) {super(fm);this.fm = fm;this.titles = titles;this.fragments = fragments;}@Overridepublic Fragment getItem(int position) {return fragments.get(position);}@Overridepublic int getCount() {return fragments.size();}@Nullable@Overridepublic CharSequence getPageTitle(int position) {return titles[position];}@Overridepublic Object instantiateItem(ViewGroup container, int position) {FragmentTransaction ft = fm.beginTransaction();for (int i = 0; i < getCount(); i++) {//通过遍历清除所有缓存final long itemId = getItemId(i);//得到缓存fragment的名字String name = makeFragmentName(container.getId(), itemId);//通过fragment名字找到该对象BaseFragment fragment = (BaseFragment) fm.findFragmentByTag(name);if (fragment != null) {//移除之前的fragmentft.remove(fragment);}}//重新添加新的fragment:最后记得commitft.add(container.getId(), getItem(position)).attach(getItem(position)).commit();return getItem(position);}@Overridepublic int getItemPosition(Object object) {return POSITION_NONE;}/*** 得到缓存fragment的名字** @param viewId* @param id* @return*/private String makeFragmentName(int viewId, long id) {return "android:switcher:" + viewId + ":" + id;}
}

TextView 设置 Drawable

mTvWorkWay.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.icon_selectmore_active, 0);

拍照快门声

var audioManager: AudioManager = requireActivity().getSystemService(Context.AUDIO_SERVICE) as AudioManager
var ringerMode = audioManager.getRingerMode()mMediaActionSound = MediaActionSound()
mMediaActionSound.load(MediaActionSound.SHUTTER_CLICK)//铃音模式
if (ringerMode == AudioManager.RINGER_MODE_NORMAL) {mMediaActionSound.play(MediaActionSound.SHUTTER_CLICK)
}

toJsonTree

//避免泛型擦除

  /*** 用于保存集合** @param key  key* @param list 集合数据* @return 保存结果*/
public static <T> boolean putListData(SharedPreferences sp, String key, LinkedList<T> list) {boolean result;SharedPreferences.Editor editor = sp.edit();JsonArray array = new JsonArray();Gson gson = new Gson();for (int i = 0; i < list.size(); i++) {JsonElement obj = gson.toJsonTree(list.get(i));array.add(obj);}
}

/*** 获取保存的List** @param key key* @return 对应的Lis集合*/public static <T> LinkedList<T> getListData(SharedPreferences sp, String key, Class<T> cls) {LinkedList<T> list = new LinkedList<>();String json = sp.getString(key, "");if (!json.equals("") && json.length() > 0) {Gson gson = new Gson();JsonArray array = new JsonParser().parse(json).getAsJsonArray();for (JsonElement elem : array) {list.add(gson.fromJson(elem, cls));}}return list;}

输出堆栈

        Writer writer = new StringWriter();PrintWriter printWriter = new PrintWriter(writer);ex.printStackTrace(printWriter);Throwable cause = ex.getCause();while (cause != null) {cause.printStackTrace(printWriter);cause = cause.getCause();}printWriter.close();String result = writer.toString();

LIstView

public View getView(int position, View convertView, ViewGroup parent) {Holder holder;if (convertView == null) {holder = new Holder();
···convertView.setTag(holder);} else {holder = (Holder) convertView.getTag();}
}
static class Holder {}

验证并初始化GLS

private GLFrameSurface mGLSurfaceView;
private GLFrameRenderer mRenderer;
private boolean supportsEs2;public class GLFrameSurface extends GLSurfaceView {String TAG = "GLFrameSurface";public GLFrameSurface(Context context) {super(context);}public GLFrameSurface(Context context, AttributeSet attrs) {super(context, attrs);}@Overrideprotected void onAttachedToWindow() {Log.v(TAG, "surface onAttachedToWindow()");super.onAttachedToWindow();// setRenderMode() only takes effectd after SurfaceView attached to window!// note that on this mode, surface will not render util GLSurfaceView.requestRender() is// called, it's good and efficient -v-setRenderMode(RENDERMODE_WHEN_DIRTY);Log.v(TAG, "surface setRenderMode RENDERMODE_WHEN_DIRTY");}
}

private void initFusionGlSurface() {mGLSurfaceView = new GLFrameSurface(this);mGLSurfaceView.setVisibility(View.INVISIBLE);ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);ConfigurationInfo configurationInfo = activityManager.getDeviceConfigurationInfo();supportsEs2 = configurationInfo.reqGlEsVersion >= 0x20000;if (supportsEs2) {// Request an OpenGL ES 2.0 compatible context.mGLSurfaceView.setEGLContextClientVersion(2);mRenderer = new GLFrameRenderer(this, mGLSurfaceView);mGLSurfaceView.setRenderer(mRenderer);}mAnalyserIfrCameraShow.addView(mGLSurfaceView);// 这句代码很重要，没有它会出现异常情况;mGLSurfaceView.setZOrderMediaOverlay(true);}

List 嵌套

public class ScrollListView extends ListView {public ScrollListView(Context context) {super(context);}public ScrollListView(Context context, AttributeSet attrs) {super(context, attrs);}public ScrollListView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST);super.onMeasure(widthMeasureSpec, expandSpec);}}

SpannerString

可点击，可变色字符串

  weightTip.setMovementMethod(LinkMovementMethod.getInstance());

  @NonNullpublic static SpannableString createAgreementString(@NonNull final Activity activity, @NonNull String format) {String smrz = new String("实名个人信息");String zxkf = new String("在线客服");String agreementString = String.format(Locale.ENGLISH, format, "实名个人信息认证", "在线客服");SpannableString spannableString = new SpannableString(agreementString);int smrzSI = agreementString.indexOf(smrz);int zxkfSI = agreementString.indexOf(zxkf);spannableString.setSpan(new ClickableSpan() {@Overridepublic void updateDrawState(TextPaint ds) {super.updateDrawState(ds);ds.setColor(activity.getResources().getColor(R.color.app_color));ds.setUnderlineText(false);}@Overridepublic void onClick(View widget) {}}, smrzSI, smrzSI+smrz.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);spannableString.setSpan(new ClickableSpan() {@Overridepublic void updateDrawState(TextPaint ds) {super.updateDrawState(ds);ds.setColor(activity.getResources().getColor(R.color.app_color));ds.setUnderlineText(false);}@Overridepublic void onClick(View widget) {RouterHelper.startWebView(activity, activity.getString(R.string.service_url));}}, zxkfSI, zxkfSI+zxkf.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);return spannableString;}

防抖动

import android.os.SystemClock;public class FastClickInterceptor {private static final long MIN_INTERVAL = 1000;private long mLastClickTime;public boolean shouldIntercept() {if (SystemClock.elapsedRealtime() - mLastClickTime < MIN_INTERVAL) {return true;}mLastClickTime = SystemClock.elapsedRealtime();return false;}
}