Android chrisbanes-PhotoView 使用案例

今天用了下chrisbanes-PhotoView 第三方library，地址：https://github.com/chrisbanes/PhotoView/tree/master

Android studio注意导入library Modules的时候，要在最外层的build.gradle里面加上classpath ‘com.novoda:bintray-release:0.3.4’
比如这样：

// Top-level build file where you can add configuration options common to all sub-projects/modules.buildscript {repositories {jcenter()}dependencies {classpath 'com.android.tools.build:gradle:1.3.0'classpath 'com.novoda:bintray-release:0.3.4'// NOTE: Do not place your application dependencies here; they belong// in the individual module build.gradle files}
}allprojects {repositories {jcenter()}
}task clean(type: Delete) {delete rootProject.buildDir
}

可以去看上面的例子，也可以看下面的三个例子：

1、SimpleSample 基础案例

 <uk.co.senab.photoview.PhotoViewandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"android:id="@+id/pv"/>

public class SimpleActivity extends Activity {private ImageView imageView;private PhotoViewAttacher attacher;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_simple);imageView = (ImageView) findViewById(R.id.pv);imageView.setImageResource(R.drawable.wallpaper);attacher = new PhotoViewAttacher(imageView);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main_menu, menu);return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {MenuItem item = menu.findItem(R.id.menu_zoom_toggle);if (item != null) {item.setTitle(attacher.canZoom() ? "Disable Zoom" : "Enable Zoom");}return super.onPrepareOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {case R.id.menu_zoom_toggle:// 根据手势缩放attacher.setZoomable(!attacher.canZoom());break;case R.id.menu_random:// 缩放到随机比例Random random = new Random();float minScale = attacher.getMinimumScale();float maxScale = attacher.getMaximumScale();float randomScale = minScale + (random.nextFloat() * (maxScale - minScale));attacher.setScale(randomScale, true);break;}return super.onOptionsItemSelected(item);}@Overrideprotected void onDestroy() {super.onDestroy();attacher.cleanup();}
}

2、ViewPagerSample 滑动案例

public class ViewPagerActivity extends Activity {private ViewPager mViewPager;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_viewpager);mViewPager = (ViewPager) findViewById(R.id.viewpager);mViewPager.setAdapter(new SamplePagerAdapter());}static class SamplePagerAdapter extends PagerAdapter {private static final int[] sDrawables = {R.drawable.wallpaper, R.drawable.wallpaper, R.drawable.wallpaper, R.drawable.wallpaper};@Overridepublic Object instantiateItem(ViewGroup container, int position) {PhotoView photoView = new PhotoView(container.getContext());photoView.setImageResource(sDrawables[position]);container.addView(photoView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);return photoView;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {container.removeView((View) object);}@Overridepublic int getCount() {return sDrawables.length;}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}}
}

3、RotationSample 图片旋转案例

public class RotationSampleActivity extends Activity {private PhotoView photoView;private final android.os.Handler handler = new android.os.Handler();private boolean rotating = false;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_rotation);photoView = (PhotoView) findViewById(R.id.pv);photoView.setImageResource(R.drawable.wallpaper);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {menu.add(Menu.NONE, 0, Menu.NONE, "Rotate 10° Right");menu.add(Menu.NONE, 1, Menu.NONE, "Rotate 10° Left");menu.add(Menu.NONE, 2, Menu.NONE, "Toggle automatic rotation");menu.add(Menu.NONE, 3, Menu.NONE, "Reset to 0");menu.add(Menu.NONE, 4, Menu.NONE, "Reset to 90");menu.add(Menu.NONE, 5, Menu.NONE, "Reset to 180");menu.add(Menu.NONE, 6, Menu.NONE, "Reset to 270");return super.onCreateOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {case 0:photoView.setRotationBy(10);return true;case 1:photoView.setRotationBy(-10);return true;case 2:toggleRotation();return true;case 3:photoView.setRotationTo(0);return true;case 4:photoView.setRotationTo(90);return true;case 5:photoView.setRotationTo(180);return true;case 6:photoView.setRotationTo(270);return true;}return super.onOptionsItemSelected(item);}private void toggleRotation() {if (rotating) {handler.removeCallbacksAndMessages(null);} else {rotateLoop();}rotating = !rotating;}private void rotateLoop() {handler.postDelayed(new Runnable() {@Overridepublic void run() {photoView.setRotationBy(1);rotateLoop();}}, 15);}
}

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