1.首先需要系統簽名。
2.達到的效果:
應用被禁用後,圖標也從桌面上消失。
3.參考Settings源碼,最終實現的代碼如下:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.testdiableapp"
android:versionCode="1"
android:sharedUserId="android.uid.system"
android:versionName="1.0" >
<permission
android:name="android.permission.CHANGE_COMPONENT_ENABLED_STATE"
android:protectionLevel="signatureOrSystem"/>
........
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init(){
Button bt = (Button)findViewById(R.id.dis);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
EditText text = (EditText)findViewById(R.id.input);
String packageName = text.getText().toString();
PackageManager pm = getPackageManager();
pm.setApplicationEnabledSetting(packageName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER, 0);
}
});
Button en = (Button)findViewById(R.id.en);
en.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
EditText text = (EditText)findViewById(R.id.input);
String packageName = text.getText().toString();
PackageManager pm = getPackageManager();
pm.setApplicationEnabledSetting(packageName, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT, 0);
}
});
}
}
4.Settings中的源碼分析:
從這段代碼可以看出,進入設置的App管理中,如果是system app,就會顯示“DISABLE“,非system app,則會顯示“UNINSTALL“。
如下圖:
當點擊DISABLE之後,彈出對話框確認是否執行DISABLE動作:
case DLG_DISABLE:
return new AlertDialog.Builder(getActivity())
.setTitle(getActivity().getText(R.string.app_disable_dlg_title))
.setMessage(getActivity().getText(R.string.app_disable_dlg_text))
.setPositiveButton(R.string.dlg_ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Disable the app
new DisableChanger(getOwner(), getOwner().mAppEntry.info,
PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER)
.execute((Object)null);
}
})
.setNegativeButton(R.string.dlg_cancel, null)
.create();
點擊確認執行:
static class DisableChanger extends AsyncTask<Object, Object, Object> {
final PackageManager mPm;
final WeakReference<InstalledAppDetails> mActivity;
final ApplicationInfo mInfo;
final int mState;
DisableChanger(InstalledAppDetails activity, ApplicationInfo info, int state) {
mPm = activity.mPm;
mActivity = new WeakReference<InstalledAppDetails>(activity);
mInfo = info;
mState = state;
}
@Override
protected Object doInBackground(Object... params) {
mPm.setApplicationEnabledSetting(mInfo.packageName, mState, 0);
return null;
}
}
調用PackageManager的setApplicationEnabledSetting()最終會進入到PackageManagerService的setEnabledSetting()函數:
在這個函數中會檢查APP是否有android.Manifest.permission.CHANGE_COMPONENT_ENABLED_STATE權限。
而這個權限是隻有system app才能使用的,這也是爲什麼APP需要系統簽名。(非system app即便在AndroidManifest.xml中強制寫上,安裝時也不會寫入/data/system/packages.xml)
安裝後package.xml中的內容:
<package name="com.example.testdiableapp" codePath="/system/app/TestDisable.apk"
nativeLibraryPath="/data/data/com.example.testdiableapp/lib" flags="1"
ft="152e863d9e0" it="152e8a98806" ut="152e8a98806" version="1" sharedUserId="1000">
<sigs count="1">
<cert index="1" />
</sigs>
</package>
5.最後的效果圖:
以禁用聯繫人(com.android.contacts)這個APP來Demo:
禁用前:
在Demo中輸入要被com.android.contacts:
禁用後聯繫人圖標已經消失了:
測試在4.0.3 -> 6.0.1 上運行沒有問題。
其餘版本沒有測試過。
Demo App下載地址:http://download.csdn.net/detail/xxooyc/9433068