一个简单的android便签app

源码下载

MainActivity.java

package com.zp.myfirstapp;import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;import com.zp.myfirstapp.R;import android.app.Activity;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.ListView;public class MainActivity extends Activity implements OnClickListener,OnItemClickListener, OnItemLongClickListener {private Button add_bt;private ListView listV;private MyAdapter adapter;private List<Map<String, Object>> data_list;private FragmentManager manager;private OptionMenu menu;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);init();RefreshItem();}//重新加载listviewprivate void RefreshItem() {data_list.clear();String filePath = this.getFilesDir().toString();File folder = new File(filePath);File[] file = folder.listFiles();ArrayList<String> filenamelist = new ArrayList<String>();for (int i = 0; i < file.length; i++) {filenamelist.add(file[i].getAbsolutePath());}//降序//Collections.sort(filenamelist,Collections.reverseOrder());//升序Collections.sort(filenamelist);for (int i = 0; i < file.length; i++) {File filex = new File(filenamelist.get(i));String content = RWFile.readFile(filex);Map<String, Object> map = new HashMap<String, Object>();map.put("content", content);map.put("filename", getFileName(filex));map.put("isChecked", Boolean.FALSE);data_list.add(map);}adapter.notifyDataSetChanged();}//获取文件名public String getFileFullName(File file) {String path = file.getAbsolutePath();int index = path.lastIndexOf("/") + 1;String filefullname = path.substring(index);return filefullname;}public String getFileName(File file) {String filefullname = getFileFullName(file);int index = filefullname.lastIndexOf(".");String filename = filefullname.substring(0, index);return filename;}//初始化数据private void init() {add_bt = (Button) findViewById(R.id.add_bt);add_bt.setOnClickListener(this);listV = (ListView) findViewById(R.id.ListView);data_list = new ArrayList<Map<String, Object>>();adapter = new MyAdapter(this, data_list);listV.setAdapter(adapter);listV.setOnItemClickListener(this);listV.setOnItemLongClickListener(this);this.registerForContextMenu(listV);manager = getFragmentManager();}//设置按钮点击事件@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.add_bt: {Intent intent = new Intent(this, EditorActivity.class);startActivityForResult(intent, 0);break;}}}// 根据返回值执行不同事件@Overrideprotected void onActivityResult(int requestCode, int resultCode,Intent intent) {switch (resultCode) {case 0: {RefreshItem();break;}}super.onActivityResult(requestCode, resultCode, intent);}//设置item点击事件@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position,long id) {@SuppressWarnings("unchecked")Map<String, Object> map = (Map<String, Object>) adapter.getItem(position);Intent intent = new Intent(MainActivity.this, EditorActivity.class);Bundle bundle = new Bundle();bundle.putString("filename", map.get("filename").toString());intent.putExtras(bundle);startActivityForResult(intent, 0);}//设置item长按事件@Overridepublic boolean onItemLongClick(AdapterView<?> parent, View view,int position, long id) {menu = new OptionMenu();if(manager.getBackStackEntryCount()==0){FragmentTransaction transaction = manager.beginTransaction();transaction.replace(R.id.LinearLayout, menu);transaction.addToBackStack(null);transaction.commit();}adapter.setVisiblity(true);adapter.notifyDataSetChanged();add_bt.setVisibility(View.GONE);return true;}//按钮事件public void doclick(View view) {switch (view.getId()) {case R.id.SA_bt:for (int i = 0; i < data_list.size(); i++) {data_list.get(i).put("isChecked", true);}adapter.notifyDataSetChanged();break;case R.id.SN_bt:for (int i = 0; i < data_list.size(); i++) {data_list.get(i).put("isChecked", false);}adapter.notifyDataSetChanged();break;case R.id.RS_bt:for (int i = 0; i < data_list.size(); i++) {if ((Boolean) data_list.get(i).get("isChecked")) {data_list.get(i).put("isChecked", false);} else {data_list.get(i).put("isChecked", true);}}adapter.notifyDataSetChanged();break;case R.id.del_bt:for (int i = 0; i < data_list.size(); i++) {if ((Boolean) data_list.get(i).get("isChecked")) {String filepath = this.getFilesDir().toString() + "/"+ data_list.get(i).get("filename") + ".txt";File file = new File(filepath);file.delete();}}RefreshItem();adapter.notifyDataSetChanged();case R.id.cal_bt:add_bt.setVisibility(View.VISIBLE);onBackPressed();adapter.setVisiblity(false);adapter.notifyDataSetChanged();break;}}//设置返回按钮事件@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// TODO Auto-generated method stubswitch (keyCode) {case KeyEvent.KEYCODE_BACK:onBackPressed();add_bt.setVisibility(View.VISIBLE);adapter.setVisiblity(false);adapter.notifyDataSetChanged();break;}return false;}
}

EditorActivity.java

package com.zp.myfirstapp;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import com.zp.myfirstapp.R;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;public class EditorActivity extends Activity implements OnClickListener {private Button save_bt, del_bt;private EditText editT;private String filename;private String content;private Intent intent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_editor);intent = getIntent();init();getFileName();}//获取从MainActivity中传过来的文件名private void getFileName() {// TODO Auto-generated method stubBundle bundle = intent.getExtras();if (bundle != null) {filename = bundle.get("filename") + ".txt";File file = new File(this.getFilesDir() + "/" + filename);editT.setText(RWFile.readFile(file));editT.setSelection(editT.getText().length());}}//初始化数据private void init() {// TODO Auto-generated method stubsave_bt = (Button) findViewById(R.id.save_bt);del_bt = (Button) findViewById(R.id.del_bt);save_bt.setOnClickListener(this);del_bt.setOnClickListener(this);editT = (EditText) findViewById(R.id.EditText);//获取当前时间，并设置为文件名SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd-hh-mm-ss");String date = sDateFormat.format(new Date());filename = date + ".txt";}//按钮点击的事件@Overridepublic void onClick(View v) {// TODO Auto-generated method stubswitch (v.getId()) {case R.id.save_bt: {content = editT.getText().toString();if (!content.equals("")) {RWFile.writeFile(this.getFilesDir() + "/" + filename, content);setResult(0);} elsesetResult(1);finish();break;}case R.id.del_bt: {setResult(1);finish();break;}}}//如果内容不为空，则保存为txt文件public void saveText(String str) throws IOException {if (!str.equals("")) {FileOutputStream output = openFileOutput(filename, MODE_PRIVATE);output.write(str.getBytes());output.close();}}//设置返回键的事件@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {// TODO Auto-generated method stubswitch (event.getKeyCode()) {case KeyEvent.KEYCODE_BACK: {setResult(1, intent);finish();break;}}return super.onKeyDown(keyCode, event);}
}

MyAdapter.java

package com.zp.myfirstapp;import java.util.List;
import java.util.Map;import com.zp.myfirstapp.R;import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.SimpleAdapter;
import android.widget.TextView;public class MyAdapter extends BaseAdapter {private Boolean visiblity = false;private List<Map<String, Object>> list;private LayoutInflater mInflater;private ViewHolder holder;public MyAdapter(Context context, List<Map<String, Object>> list) {super();// TODO Auto-generated constructor stubthis.list = list;mInflater = LayoutInflater.from(context);}public int getCount() {// TODO Auto-generated method stubreturn list.size();}public Object getItem(int position) {// TODO Auto-generated method stubreturn list.get(position);}public long getItemId(int position) {// TODO Auto-generated method stubreturn position;}static class ViewHolder {public CheckBox checkB;public TextView content;public TextView data;}public View getView(final int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubif (convertView == null) {holder = new ViewHolder();convertView = mInflater.inflate(R.layout.item, null);holder.checkB = (CheckBox) convertView.findViewById(R.id.checkBox);holder.data = (TextView) convertView.findViewById(R.id.textView2);holder.content = (TextView) convertView.findViewById(R.id.textView1);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.content.setText(list.get(position).get("content").toString());holder.data.setText(list.get(position).get("filename").toString());holder.checkB.setChecked((Boolean) list.get(position).get("isChecked"));//设置checkbox监视器，并根据checkbox的ischecked属性更改list中对应值holder.checkB.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView,boolean isChecked) {// TODO Auto-generated method stublist.get(position).put("isChecked", isChecked);}});if (visiblity)holder.checkB.setVisibility(View.VISIBLE);elseholder.checkB.setVisibility(View.GONE);return convertView;}// 设置checkbox是否可见public void setVisiblity(Boolean b) {visiblity = b;}
}

OptinMenu.java

package com.zp.myfirstapp;import com.zp.myfirstapp.R;import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;public class OptionMenu extends Fragment{@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {// TODO Auto-generated method stubView view=inflater.inflate(R.layout.optionmenu, null);return view;}
}

RWFile.java

package com.zp.myfirstapp;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;import android.util.Log;
import android.widget.Toast;public class RWFile {//读txt文件public static String readFile(File file) {try {FileInputStream inputStream = new FileInputStream(file);int len=inputStream.available();byte []buffer=new byte[len];inputStream.read(buffer);inputStream.close();String content=new String(buffer);return content;} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}//写txt文件public static void writeFile(String filename,String content) {File file = new File(filename);FileOutputStream outputStream;try {outputStream = new FileOutputStream(file);outputStream.write(content.getBytes());outputStream.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}

activity_editor.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="${relativePackage}.${activityClass}" ><ScrollView android:layout_weight="9"android:layout_height="match_parent"android:layout_width="match_parent"><EditTextandroid:textSize="28sp"android:id="@+id/EditText"android:layout_width="match_parent"android:layout_height="fill_parent"android:background="@drawable/edittext_bg"android:hint="请输入内容" /></ScrollView><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_weight="1"android:gravity="right" ><Buttonandroid:id="@+id/save_bt"android:layout_width="80dp"android:layout_height="wrap_content"android:focusable="true"android:text="@string/save" /><Buttonandroid:id="@+id/del_bt"android:layout_width="80dp"android:layout_height="wrap_content"android:text="@string/cancel" /></LinearLayout></LinearLayout>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context="${relativePackage}.${activityClass}" android:orientation="vertical"><LinearLayout android:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/LinearLayout"android:orientation="horizontal"android:gravity="right"></LinearLayout><FrameLayoutandroid:layout_width="match_parent"android:layout_height="match_parent" ><ListView android:layout_height="fill_parent"android:layout_width="fill_parent"android:id="@+id/ListView"></ListView><Button android:onClick="doclick"android:id="@+id/add_bt"android:focusable="false"android:layout_gravity="bottom|right"android:background="@drawable/add_bt"android:layout_height="60dp"android:layout_width="60dp"/></FrameLayout></LinearLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent" android:orientation="vertical"><LinearLayout android:layout_height="wrap_content"android:layout_width="match_parent"android:orientation="horizontal"><TextViewandroid:layout_weight="9"android:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="55dp"android:maxLines="2"android:textSize="20sp" /><CheckBoxandroid:tag=""android:id="@+id/checkBox"android:visibility="gone"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_alignParentTop="true"android:focusable="false" /></LinearLayout><TextViewandroid:id="@+id/textView2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="right"android:textSize="15sp" /></LinearLayout>

optionmenu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent" android:orientation="vertical"><LinearLayout android:layout_height="wrap_content"android:layout_width="match_parent"android:orientation="horizontal"><TextViewandroid:layout_weight="9"android:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="55dp"android:maxLines="2"android:textSize="20sp" /><CheckBoxandroid:tag=""android:id="@+id/checkBox"android:visibility="gone"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentRight="true"android:layout_alignParentTop="true"android:focusable="false" /></LinearLayout><TextViewandroid:id="@+id/textView2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="right"android:textSize="15sp" /></LinearLayout>

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