Question

我从onReceive（）开始我的活动alarmAlert.class。活动开始了。我的活动上有三个按钮和两个TextView。活动开始时，Textviews总会显示，但按钮并不总是出现。

我从MainActivity开始活动，所有视图都有效完美

我能做的一切。谢谢

我得到了一些东西。如果我的应用程序没有在后台运行（单击菜单按钮，从列表中删除应用程序）活动从onReceive（）开始，按钮不会显示。如果应用程序仍在后台运行，一切都很完美。

我的onReceive代码：

    @Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub
    int id = intent.getIntExtra("id", -1);

    try{
    Intent alertIntent=new Intent();
    alertIntent.setClass(context, AlarmAlert.class);
    Bundle bundle=new Bundle();
    bundle.putInt("id", id);
    alertIntent.putExtras(bundle);
    alertIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_NO_USER_ACTION);
    context.startActivity(alertIntent);
    }
    catch (Exception e){
        AlarmGloble.writeLog(context,"AlarmReceiver:"+e.toString());
    }

我的AlarmAlert代码的一部分

        @Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    Log.d("AA","onCreate");

    super.onCreate(savedInstanceState);
    setContentView(R.layout.alarm_alert);

    AlarmGloble.dbHelper=new DBHelper(this,AlarmGloble.DB_NAME,AlarmGloble.DB_VERSION);
    AlarmGloble.dbLib=new DataBaseLib(AlarmGloble.dbHelper);

    settingFromId();

    findViews();
    setListener();
    updateView();
    mVibrator=(Vibrator)getSystemService(Context.VIBRATOR_SERVICE); 

    setSystemVolume(0);

    //play mp3 by Handler
    mHandler.sendMessage(mHandler.obtainMessage(PLAY));


}

    private void updateView(){
    TextView textViewSnooze=(TextView)findViewById(R.id.alarm_alertTextViewSnooze);
    if (mp3Test){
        textViewSnooze.setVisibility(View.INVISIBLE);
        spinnerSnooze.setVisibility(View.INVISIBLE);
        buttonClose.setVisibility(View.INVISIBLE);
        buttonEdit.setVisibility(View.INVISIBLE);
    }
    else {
        textViewSnooze.setVisibility(View.VISIBLE);
        spinnerSnooze.setVisibility(View.VISIBLE);
        buttonClose.setVisibility(View.VISIBLE);
        buttonEdit.setVisibility(View.VISIBLE);

        if(alarmRept<=0){           
            textViewSnooze.setVisibility(View.VISIBLE);
            spinnerSnooze.setVisibility(View.VISIBLE);
        }
        else{
            textViewSnooze.setVisibility(View.INVISIBLE);
            spinnerSnooze.setVisibility(View.INVISIBLE);
            if (alarmReptCount<alarmReptTimes)
                if (alarmKind==0)
                    mMessage=mMessage+"\n"+"next alarm :"+mClockSnooze[alarmRept]+" ";
                else
                    mMessage=mMessage+"\n"+"next alarm:"+AlarmGloble.rept[alarmRept]+" ";

        }

    }

    textViewMessage.setText(mMessage);


    if(mMp3.equals(AlarmGloble.RANDOM)){
        File file=new File(AlarmGloble.ROOT_MUSIC);
        RandomMp3 rm=new RandomMp3(file);
        if (rm.getCount()>0)
            mMp3=rm.getFile();
        else
            mMp3="";

    }
    else {
        if(mMp3.equals(AlarmGloble.DEFAULT)){
            mMp3=getDefaultMP3();
        }
        else{
            String[] s=mMp3.split("/");
            textViewSongName.setText(s[s.length-1]);
        }
    }

    if (mMp3.equals("")){
        textViewSongName.setText(mMp3);
    }
    else {
        String[] s=mMp3.split("/");
        textViewSongName.setText(s[s.length-1]);
    }
    (LinearLayout)findViewById(R.id.alarm_alertLinearLayoutButtons);
    linearLayoutButtons.requestFocus();
}

这里是alarm_alert.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:id="@+id/linearLayoutAlarmAlert" >

<LinearLayout
    android:id="@+id/alarm_alertLinearLayoutButtons"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <Button
        android:id="@+id/alarm_alertButtonClose"
        style="@style/Button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btnClose" />

    <Button
        android:id="@+id/alarm_alertButtonEdit"
        style="@style/Button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btnEdit"
        android:visibility="visible" />

    <Button
        android:id="@+id/alarm_alertButtonDismiss"
        style="@style/Button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btnExit"
        android:visibility="visible" />

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <TextView
        android:id="@+id/alarm_alertTextViewSnooze"
        style="@style/RedLeft17sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/snooze" />

    <Spinner
        android:id="@+id/alarm_alertSpinnerSnooze"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1" />

</LinearLayout>

<TextView
    android:id="@+id/alarm_alertTextViewMessage"
    style="@style/YellowLeft17sp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/btnClose" />

<TextView
    android:id="@+id/alarm_alertTextViewSongName"
    style="@style/YellowLeft17sp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ellipsize="marquee"
    android:marqueeRepeatLimit="marquee_forever"
    android:text="@string/btnClose" />    
</LinearLayout>

Answer 1

我只能在AlarmAlert Activity中看到2个按钮buttonClose和buttonEdit，所以我假设没有显示的3个按钮位于alarm_alertLinearLayoutButtons.xml中，应该在alarm_alert.xml中重复使用

<include layout="@layout/alarm_alertLinearLayoutButtons"/>

参考：http://developer.android.com/training/improving-layouts/reusing-layouts.html

除了最后几行之外，我看不出有任何问题。 linearLayoutButtons未设置。

linearLayoutButtons = (LinearLayout)findViewById(R.id.alarm_alertLinearLayoutButtons);
linearLayoutButtons.requestFocus();

来自BroadcastReceiver的startActivity按钮上的活动视图不会显示

1 个答案: