Android用當前App啓動其它App

我目前遇到過兩次這種情況,一次是在本App中啓動一個主界面Activity,另一個是在本App中啓動其它App.共同點是都需要監聽開機廣播,在接收函數裏startActivity.

在本App中啓動MainActivity

需要注意以下幾點:

1.需要靜態註冊廣播接收器

2.startActivity前面要加上一句 (創建的intent變量).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

3.普通app需要安裝後啓動一次才能正常接收開機廣播,或者你可以將apk push到/system/app目錄下,變成系統應用

下面再說在AndroidManifest.xml中註冊的廣播接收器代碼

<receiver
            android:name="selfTest.MyBootCompleteReceiver"
            android:enabled="true"
            android:exported="true" >
            <intent-filter android:priority="1000" >
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>

別忘了要加上權限聲明

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

然後創建一個MyBootCompleteReceiver.java文件

public class MyBootCompleteReceiver extends BroadcastReceiver {
	public MyBootCompleteReceiver() {
	}

	@Override
	public void onReceive(final Context context, Intent intent) {
			Intent BootBroadcastIntent = new Intent(context, IsRebootTestContinueActivity.class);
			BootBroadcastIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			context.startActivity(BootBroadcastIntent);

	}
}

在本App中啓動其它App

只需改動一處

public class MyBootCompleteReceiver extends BroadcastReceiver {
	public final static String PACKAGE_NAME = "包名";
	public final static String CLASS_NAME   = "類名";
	public MyBootCompleteReceiver() {
	}

	@Override
	public void onReceive(final Context context, Intent intent) {
		mylog("接收到開機廣播", context);
		Intent in = new Intent();
		in.setClassName(PACKAGE_NAME, CLASS_NAME);
		if(in !=null){
			in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			context.startActivity(in); //啓動app B
		}
		/*Intent in = new Intent(context, MainActivity.class);
		in.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		context.startActivity(in);*/
	}
}

之前曾以爲需要將要啓動的Activity的屬性android:exported設置爲true,實踐發現不需要.

需要知道目標Activity的包名和類名,請參考這篇博文.