Android studio在启动新活动时打开应用程序
Android studio在启动新活动时打开应用程序
提问于 2020-10-22 15:38:37
我想做的是:创建一个警报应用程序，当警报管理器激活时，切换到一个新的活动并打开应用程序(可以停止警报的活动)
我的代码现在发生的事情是这样的: Alarmmanager关闭，它切换到新的活动，但应用程序没有打开。您必须手动打开才能看到停止报警屏幕。我该怎么做呢？
Mainactivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TimePicker klok = findViewById(R.id.timePicker1);
klok.setIs24HourView(true);
final Button getTimeBtn = findViewById(R.id.getTimeBtn);
final TextView showText = findViewById(R.id.showText);
Intent intent = new Intent(this, AlarmActivation.class);
final PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 234324243, intent, 0);
final AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
getTimeBtn.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onClick(View view) {
int uur = klok.getHour();
int minuut = klok.getMinute();
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, uur);
cal.set(Calendar.MINUTE, minuut);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
Toast.makeText(getApplication().getApplicationContext(), "Alarm gaat om " + uur + ":" + minuut,Toast.LENGTH_LONG).show();
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);
showText.setText(Integer.toString(uur) + ':' + Integer.toString(minuut));
}
});
}
}AlarmActivation.java
public class AlarmActivation extends BroadcastReceiver {
MediaPlayer mp;
@Override
public void onReceive(Context context, Intent intent) {
Log.d("alarmact", "voor de service");
Intent alarmIntent = new Intent(context, MainActivity2.class);
alarmIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(alarmIntent);
}
}MainActivity2.java
public class MainActivity2 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON,
WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
}
}AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wekkerapp">
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity2"
android:label="@string/title_activity_main2"
android:theme="@style/AppTheme.NoActionBar"></activity>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".AlarmActivation"></receiver>
<service
android:name=".WekkerService"
android:enabled="true"/>
</application>
</manifest>希望有人能在这方面帮我一点忙
回答 1
Stack Overflow用户
发布于 2020-10-22 15:57:16
在你的MainActivity2中加入BroadcastReceiver怎么样？
就像这样。
public class MainActivity2 extends AppCompatActivity {
public static final String BROAD_TAG = "braodTag";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON,
WindowManager.LayoutParams.FLAG_FULLSCREEN |
WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter(BROAD_TAG));
}
public BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent != null) {
if (isRunningActivity) {
//get Data from intent if you need
}
}
}
};
}当你发送数据时，(AlarmActivation.java)
public class AlarmActivation extends BroadcastReceiver {
MediaPlayer mp;
@Override
public void onReceive(Context context, Intent intent) {
Log.d("alarmact", "voor de service");
Intent braodintent = new Intent(MainActivity2.BROAD_TAG);
LocalBroadcastManager.getInstance(this).sendBroadcast(braodintent);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64477422
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