當有AP被install / uninstall時,
系統會發出Broadcast ：ACTION_PACKAGE_ADDED / ACTION_PACKAGE_REMOVED,
假設我們在APP List的畫面中,
希望能"即時"的在AP有新增/移除時變更於Activity,
就需要建立BroadcastReceiver
=======================方法一：不用新增class也不用在Manifest.xml中宣告=======================
@Override
protected void onResume()
{
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_PACKAGE_ADDED);
//只能接收用adb install的安裝事件
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
//只能接收用adb uninstall的反安裝事件
filter.addDataScheme("package");
mIntentReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
final String action = intent.getAction();
if (Intent.ACTION_PACKAGE_ADDED.equals(action))
{
Uri data = intent.getData();
String pkgName = data.getEncodedSchemeSpecificPart();
//pkgName為被安裝AP的package name, 在存入SQLite時必須要的資訊
queryAPInfo();
Toast.makeText(context, "ACTION_PACKAGE_ADDED", Toast.LENGTH_SHORT).show();
}
else if (Intent.ACTION_PACKAGE_REMOVED.equals(action))
{
queryAPInfo();
Toast.makeText(context, "ACTION_PACKAGE_REMOVED", Toast.LENGTH_SHORT).show();
}
}
};
registerReceiver(mIntentReceiver, filter);
super.onResume();
}
@Override
protected void onPause()
{
context.unregisterReceiver(mIntentReceiver);
super.onPause();
}
//改一下queryAPInfo()
//此function所做的: 重新查一遍package的資料, 並setAdapter()更新畫面
public void ArrayList<String> queryAPInfo()
{
for(int i = 0 ; i <allappPagInfo.size() ; i ++)
{
list_apPag = new ArrayList<String>();
list_apName = new ArrayList<String>();
PackageInfo appPI = allappPagInfo.get(i);
//PackageInfo{2ad3d2e0 com.android.launcher}
String apPag = appPI.packageName;
//com.android.launcher
list_apPag.add(apPag);
String apName = appPI.applicationInfo.loadLabel(packageManager).toString();
//Launcher
list_apName.add(apName);
}
ArrayAdapter<String> adapter = new
ArrayAdapter<String>(context, android.R.layout.simple_list_item_1,
list_apName);
GridView gridView1 = (GridView) findViewById (R.id.gridView1);
gridView1.setAdapter(adapter);
}
=======================方法二：新增class且要在Manifest.xml中宣告=======================
1. adb uninstall
2. User在Device上操作解除安裝
都可以偵測到
./AndroidManifest.xml
<receiver android:name=".PackageReceiver" >
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<action android:name="android.intent.action.PACKAGE_REMOVED" />
<data android:scheme="package" />
</intent-filter>
</receiver>
./src/com.tsots.AppManager/Activity.java
package com.tsots.AppManager;
public class Activity extends Activity
{
protected void onCreate(Bundle icicle)
{
.....
}
@Override
protected void onResume()
{
PackageReceiver BRC = new PackageReceiver();
IntentFilter mFilter1, mFilter2;
//過濾PACKAGE_ADDED與PACKAGE_REMOVED事件
mFilter1 = new IntentFilter(BRC.addpk_ACTION);
mFilter2 = new IntentFilter(BRC.removepk_ACTION);
mFilter1.addDataScheme("package");
mFilter2.addDataScheme("package");
//註冊Receiver
registerReceiver(BRC, mFilter1);
registerReceiver(BRC, mFilter2);
super.onResume();
}
public class PackageReceiver extends BroadcastReceiver
{
private static final String addpk_ACTION = "android.intent.action.PACKAGE_ADDED";
private static final String removepk_ACTION = "android.intent.action.PACKAGE_REMOVED";
@Override
public void onReceive(Context context, Intent intent)
{
if (intent.getAction().equals(addpk_ACTION))
{
Uri data = intent.getData();
String pkgName = data.getEncodedSchemeSpecificPart();
//pkgName為package名稱
Intent iSend = new Intent(addpk_ACTION);
//送出廣播
context.sendBroadcast(iSend);
}
else if (intent.getAction().equals(removepk_ACTION))
{
Uri data = intent.getData();
String pkgName = data.getEncodedSchemeSpecificPart();
//pkgName為package名稱
Intent iSend = new Intent(removepk_ACTION);
//送出廣播
context.sendBroadcast(iSend);
}
}
}}
