按下按钮后，应用程式当机，但未显示任何错误 [英] App crashes when button is hit although no errors shown
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问题描述
我正在尝试用四个不同的活动构建一个应用程序.
I'm trying to build an app with four different activities.
在我的起始页上，有4个按钮.当您单击一个按钮时，您将被带往相应的活动.
On my start page, there are 4 buttons. When you click on a button you should be directed to the correspondent activity.
尽管我的代码没有语法错误，但是当我按下一个按钮时，我的应用程序总是崩溃.
Although my code has no syntax errors, my app always crashes when I hit a single button.
能不能告诉我我的代码出了什么问题?
Can some please tell me what is wrong with my code?
我的MainActivity
package com.group6.travlhoe;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.support.annotation.NonNull;
import android.support.design.widget.BaseTransientBottomBar;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity implements
View.OnClickListener {
Button btnTransport, btnUnterkunft, btnAllgemein, btnRechnung;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnTransport = (Button) findViewById(R.id.Transport);
btnAllgemein = (Button) findViewById(R.id.Allgemein);
btnUnterkunft = (Button) findViewById(R.id.Unterkunft);
btnRechnung = (Button) findViewById(R.id.Rechnung);
btnTransport.setOnClickListener(this);
btnRechnung.setOnClickListener(this);
btnAllgemein.setOnClickListener(this);
btnUnterkunft.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.Allgemein) {
startActivity(new Intent(MainActivity.this, Allgemein.class));
} else if (v.getId() == R.id.Transport) {
startActivity(new Intent(MainActivity.this, Transport.class));
} else if (v.getId() == R.id.Unterkunft) {
startActivity(new Intent(MainActivity.this, Unterkunft.class));
} else if (v.getId() == R.id.Rechnung) {
startActivity(new Intent(MainActivity.this, Rechnung.class));
}
}
}
按钮应将其定向到以下类别之一:
package com.group6.travlhoe;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class Allgemein extends AppCompatActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_allgemein);
}
}
我的错误日志文件:
06-22 17:33:17.073 1414-1600/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:17.073 1414-1600/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:17.073 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:17.074 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:17.074 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:22.111 1414-1599/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:22.111 1414-1599/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:22.111 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:22.120 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:22.120 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:26.330 1517-1530/? E/memtrack: Couldn't load memtrack module
06-22 17:33:27.159 1414-1499/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:27.159 1414-1499/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:27.159 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:27.165 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:27.166 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:32.203 1414-1499/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:32.203 1414-1499/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:32.203 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:32.211 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:32.211 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:37.259 1414-1599/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:37.259 1414-1599/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:37.260 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:37.265 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:37.265 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:42.359 1414-1414/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:42.360 1414-1414/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:42.360 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:42.366 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:42.368 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:47.604 1414-1599/? E/AudioFlinger: not enough memory for AudioTrack size=131296
06-22 17:33:47.606 1414-1599/? E/AudioFlinger: createRecordTrack_l() initCheck failed -12; no control block?
06-22 17:33:47.652 2269-10242/? E/AudioRecord: AudioFlinger could not create record track, status: -12
06-22 17:33:47.824 2269-10242/? E/AudioRecord-JNI: Error creating AudioRecord instance: initialization check failed with status -12.
06-22 17:33:47.825 2269-10242/? E/android.media.AudioRecord: Error code -20 when initializing native AudioRecord object.
06-22 17:33:47.835 2269-10242/? E/ActivityThread: Failed to find provider info for com.google.android.apps.gsa.testing.ui.audio.recorded
06-22 17:33:48.125 1517-1530/? E/memtrack: Couldn't load memtrack module
06-22 17:33:48.760 1417-1573/? E/installd: Failed to delete /data/app/vmdl1116498233.tmp: No such file or directory
06-22 17:33:48.930 2154-4609/? E/NetworkScheduler.SR: Invalid parameter app
06-22 17:33:48.930 2154-4609/? E/NetworkScheduler.SR: Invalid package name : Perhaps you didn't include a PendingIntent in the extras?
06-22 17:33:49.162 2656-2656/? E/Finsky: [2] com.google.android.finsky.wear.bl.a(3): onConnectionFailed: ConnectionResult{statusCode=API_UNAVAILABLE, resolution=null, message=null}
06-22 17:33:49.272 2154-4609/? E/NetworkScheduler.SR: Invalid parameter app
06-22 17:33:49.272 2154-4609/? E/NetworkScheduler.SR: Invalid package name : Perhaps you didn't include a PendingIntent in the extras?
06-22 17:33:49.547 1342-1342/? E/hw-IPCThreadState: binder thread pool (1 threads) starved for 130 ms
06-22 17:33:49.752 2269-9548/? E/ContentStoreEUAS: Failed to commit the deferred actions
06-22 17:33:51.037 1352-1368/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
06-22 17:33:51.525 2154-4609/? E/ctxmgr: [AppIntervalImpl]closeInterval: ongoing
06-22 17:33:51.545 2154-2383/? E/UidImportanceUtils: exception when invoking removeOnUidImportanceListener
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at alvy.a(:com.google.android.gms:1123)
at akva.a(:com.google.android.gms:44820)
at lsx.a(:com.google.android.gms:246)
at akuz.run(:com.google.android.gms:2812)
at android.os.Handler.handleCallback(Handler.java:769)
at android.os.Handler.dispatchMessage(Handler.java:98)
at alxb.dispatchMessage(:com.google.android.gms:3028)
at android.os.Looper.loop(Looper.java:164)
at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: java.lang.IllegalArgumentException: Listener not registered: alvz@2c93e02
at android.app.ActivityManager.removeOnUidImportanceListener(ActivityManager.java:3628)
at java.lang.reflect.Method.invoke(Native Method)
at alvy.a(:com.google.android.gms:1123)
at akva.a(:com.google.android.gms:44820)
at lsx.a(:com.google.android.gms:246)
at akuz.run(:com.google.android.gms:2812)
at android.os.Handler.handleCallback(Handler.java:769)
at android.os.Handler.dispatchMessage(Handler.java:98)
at alxb.dispatchMessage(:com.google.android.gms:3028)
at android.os.Looper.loop(Looper.java:164)
at android.os.HandlerThread.run(HandlerThread.java:65)
06-22 17:33:53.354 1517-1608/? E/TaskPersister: File error accessing recents directory (directory doesn't exist?).
06-22 17:34:00.005 1517-1530/? E/memtrack: Couldn't load memtrack module
Android清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.group6.travlhoe">
<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=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
推荐答案
您缺少清单中的活动.创建活动时，也必须在此处添加该活动.
You are missing the activities from your manifest. When you create an activity it must be added here as well.
我建议阅读 Android应用程序基础.
<activity
android:name=".MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Allgemein"
android:launchMode="singleTop"/>
此外，在为活动提供的示例中，您不是overriding onCreate方法.确保您的所有活动都有此更改.
Also, In the example you provided for your activity, you are not overriding the onCreate method. Make sure all your Activities have this change.
public class Allgemein extends AppCompatActivity {
@Override //You are missing this.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_allgemein);
}
}
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