Question

此处是发生致命异常的日志记录器。单击日期和时间按钮后，第二个按钮应该导致新活动。

2018-12-12 19:41:43.911 1385-1422/? W/audio_hw_generic: Not supplying enough         
data to HAL, expected position 2007618 , only wrote 2007360
2018-12-12 19:41:44.098 4585-4585/com.example.vanessamontiel.eventplanner     
D/AndroidRuntime: Shutting down VM
2018-12-12 19:41:44.099 4585-4585/com.example.vanessamontiel.eventplanner 
E/AndroidRuntime: FATAL EXCEPTION: main

这是活动的代码：第一个按钮有效，第二个按钮无效。第一次我们对View v遇到问题，我们将View v1放到了无法使用的位置，但是这次我们删除了它，现在仍然无法使用。我们不知道可能是什么问题。这是针对我们的Android App Studio类的项目。

此外，当您单击不起作用的按钮时，它将转到“列表活动”。也许与错误有关。

public class MainActivity extends AppCompatActivity {
private TextView reservation;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //displays icon on top bar
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setLogo(R.mipmap.ic_launcher);
    getSupportActionBar().setDisplayUseLogoEnabled(true);

    reservation = (TextView)findViewById(R.id.txtReservation);
    Button button = (Button)findViewById(R.id.btnDate);
    Button button1 = (Button)findViewById(R.id.btnType);

    // define setOnClickListener for button
    button.setOnClickListener(new View.OnClickListener(){

        @Override
        public void onClick(View v) {
            new DatePickerDialog(MainActivity.this, d, c.get(Calendar.YEAR), 
c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH)).show();
        } // end onClick
    }); // end setOnClickListener

    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, 
TypeActivity.class));
        }
    });

} // end onCreate
Calendar c = Calendar.getInstance();
DateFormat fmtDate = DateFormat.getDateInstance();

DatePickerDialog.OnDateSetListener d = new 
DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker view, int year, int month, int 
dayOfMonth) {
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, dayOfMonth);
        new TimePickerDialog(MainActivity.this, t, 
c.get(Calendar.HOUR_OF_DAY), c.get(Calendar.MINUTE), false).show();
        //reservation.setText("Your event date is set for " + 
fmtDate.format(c.getTime()));
    }
}; // end DatePickerDialog

TimePickerDialog.OnTimeSetListener t = new 
 TimePickerDialog.OnTimeSetListener() {
    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        c.set(Calendar.HOUR_OF_DAY, hourOfDay);
        c.set(Calendar.MINUTE, minute);
        String amPm;
        if(hourOfDay >= 12){
            amPm = "PM";
        }
        else {
            amPm = "AM";
        }
        reservation.setText("Your event date is set for " +     
fmtDate.format(c.getTime()) + " at " + hourOfDay + ":" + minute + " " + 
amPm);
    }
};
} // end MainActivity class

编辑：logcat中的红线代码：

2018-12-12 19：41：44.099 4585-4585 / com.example.vanessamontiel.eventplanner E / Android运行时：致命异常：主要流程：com.example.vanessamontiel.eventplanner，PID：4585 java.lang.RuntimeException：无法在项目布局中找到ID为com.example.vanessamontiel.eventplanner：id / balloons的视图在android.widget.ArrayAdapter.createViewFromResource（ArrayAdapter.java:394）在android.widget.ArrayAdapter.getView（ArrayAdapter.java:371）在android.widget.AbsListView.obtainView（AbsListView.java:2363）在android.widget.ListView.makeAndAddView（ListView.java:1970）在android.widget.ListView.fillDown（ListView.java:704）在android.widget.ListView.fillFromTop（ListView.java:765）在android.widget.ListView.layoutChildren（ListView.java:1744）在android.widget.AbsListView.onLayout（AbsListView.java:2162）在android.view.View.layout（View.java:17637）在android.view.ViewGroup.layout（ViewGroup.java:5575）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:323）在android.widget.FrameLayout.onLayout（FrameLayout.java:261）在android.view.View.layout（View.java:17637）在android.view.ViewGroup.layout（ViewGroup.java:5575）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1741）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1585）在android.widget.LinearLayout.onLayout（LinearLayout.java:1494）在android.view.View.layout（View.java:17637）在android.view.ViewGroup.layout（ViewGroup.java:5575）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:323）在android.widget.FrameLayout.onLayout（FrameLayout.java:261）在com.android.internal.policy.DecorView.onLayout（DecorView.java:726）在android.view.View.layout（View.java:17637）在android.view.ViewGroup.layout（ViewGroup.java:5575）在android.view.ViewRootImpl.performLayout（ViewRootImpl.java:2346）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2068）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1254）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl.java:6337）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:874）在android.view.Choreographer.doCallbacks（Choreographer.java:686）在android.view.Choreographer.doFrame（Choreographer.java:621）在android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:860）在android.os.Handler.handleCallback（Handler.java:751）在android.os.Handler.dispatchMessage（Handler.java:95）在android.os.Looper.loop（Looper.java:154）在android.app.ActivityThread.main（ActivityThread.java:6119）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:886）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:776）

通过按钮打开新活动导致Android应用崩溃

0 个答案: