app listview

package com.example.test;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.view.Menu;
import java.util.ArrayList;
import java.util.HashMap;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnCreateContextMenuListener;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String outt = "";

final PackageManager pm = getPackageManager();
// get a list of installed apps.
List<ApplicationInfo> packages = pm
.getInstalledApplications(PackageManager.GET_META_DATA);

/*
* for (ApplicationInfo packageInfo : packages) {
*
* outt=
* outt+packageInfo.loadLabel(getPackageManager()).toString()+"\n"; outt
* = outt + packageInfo.packageName + "\n"; outt = outt +
* pm.getLaunchIntentForPackage(packageInfo.packageName) +
* "\n--------------\n";
*
* }// the getLaunchIntentForPackage returns an intent that you can use
* // with startActivity()
*/

// ListView "ListView1"
ListView list = (ListView) findViewById(R.id.ListView1);// 綁定Layout裡面的ListView

// 生成動態數組，加入數據
ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
for (ApplicationInfo packageInfo : packages) {
if (pm.getLaunchIntentForPackage(packageInfo.packageName) != null) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put("ItemImage", packageInfo.loadIcon(getPackageManager()));// Photo
// ID
map.put("ItemTitle", packageInfo.loadLabel(getPackageManager())
.toString()); // Title
map.put("ItemText",
pm.getLaunchIntentForPackage(packageInfo.packageName)); // Content
map.put("ItemText",
pm.getLaunchIntentForPackage(packageInfo.packageName)); // Content
listItem.add(map);
}
}
// 生成適配器的Item和動態數組對應的元素
SimpleAdapter listItemAdapter = new SimpleAdapter(this, listItem,// 數據源
R.layout.list_item,// ListItem的XML實現
// 動態數組與ImageItem對應的子項
new String[] { "ItemImage", "ItemTitle", "ItemText" },
// ImageItem的XML文件裡面的一個ImageView,兩個TextView ID
new int[] { R.id.ItemImage, R.id.ItemTitle, R.id.ItemText });

// Add and Show
list.setAdapter(listItemAdapter);

// One Click
list.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// One Click To-Do

}
});

// 添加長按點擊
list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {

public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// Long Press To-Do
}
});
// End of ListView "ListView1"

// Write File"test" to Internal Storage
String fileName = "test";
String content = outt;
FileOutputStream writer = null;
try {
writer = openFileOutput(fileName, Context.MODE_PRIVATE);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
writer.write(content.getBytes());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// End of Write File"test" to Internal Storage
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}

}