致命例外 - 不幸的應用程序已停止工作

我的應用程序崩潰在模擬器中。我看着logCat，發現FATAL EXCEPTION在那裏，但我不知道如何解決這個問題。我讀了類似的問題但有解決方案不能解決我的問題。請幫助我。我沒有得到我的代碼中的錯誤。致命例外 - 不幸的應用程序已停止工作

logcat的

09-12 16:25:41.390: E/AndroidRuntime(1270): FATAL EXCEPTION: main 
09-12 16:25:41.390: E/AndroidRuntime(1270): Process: com.example.hareemaudio, PID: 1270 
09-12 16:25:41.390: E/AndroidRuntime(1270): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.hareemaudio/com.example.hareemaudio.MainActivity}: java.lang.NullPointerException 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread.access$700(ActivityThread.java:135) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.os.Handler.dispatchMessage(Handler.java:102) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.os.Looper.loop(Looper.java:137) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread.main(ActivityThread.java:4998) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at java.lang.reflect.Method.invoke(Method.java:515) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at dalvik.system.NativeStart.main(Native Method) 
09-12 16:25:41.390: E/AndroidRuntime(1270): Caused by: java.lang.NullPointerException 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at com.example.hareemaudio.MainActivity.getInit(MainActivity.java:42) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at com.example.hareemaudio.MainActivity.onCreate(MainActivity.java:30) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.Activity.performCreate(Activity.java:5243) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140) 
09-12 16:25:41.390: E/AndroidRuntime(1270):  ... 11 more

MainActivity

package com.example.hareemaudio; 

import android.app.Activity; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.os.Handler; 
import android.view.View; 
import android.view.View.OnClickListener; 
//import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.SeekBar; 
import android.widget.TextView; 

public class MainActivity extends Activity implements OnClickListener { 
    SeekBar seek_bar; 
    ImageButton play_button, pause_button; 
    MediaPlayer player; 
    TextView text_shown; 
    Handler seekHandler = new Handler(); 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     //btnPlay.setClickable(true); 
     //btnPlay.setEnabled(true); 

     getInit(); 
     seekUpdation(); 
    } 

    public void getInit() { 
     seek_bar = (SeekBar) findViewById(R.id.seek_bar); 
     play_button = (ImageButton) findViewById(R.id.play_button); 
     pause_button = (ImageButton) findViewById(R.id.pause_button); 
     text_shown = (TextView) findViewById(R.id.text_shown); 
     play_button.setOnClickListener(this); 
     pause_button.setOnClickListener(this); 
     player = MediaPlayer.create(this, R.raw.fatiha); //ye wo Audio file hai jo chalarae 
     seek_bar.setMax(player.getDuration()); 

    } 

    Runnable run = new Runnable() { 

     @Override 
     public void run() { 
      seekUpdation(); 
     } 
    }; 

    public void seekUpdation() { 

     seek_bar.setProgress(player.getCurrentPosition()); 
     seekHandler.postDelayed(run, 1000); 
    } 

    /** yaha pe abi play/pause button k enable disable ka function lagaugi */ 
    @Override 
    public void onClick(View view) { 
     switch (view.getId()) { 
     case R.id.play_button: 

      /*buttonPlay.setEnabled(false); 
      buttonPause.setEnabled(true);/* 

        //or 

      /*View button = findViewById(R.id.btnPlay); 
       button.setVisibility(View.GONE); 
      * */ 
      //text_shown.setText("Playing..."); 



      player.start(); // Start playing Audio 
      break; 
     case R.id.pause_button: 
      player.pause(); //Pause Audio 
      //text_shown.setText("Paused..."); 

     } 

    } 
}

XML

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" > 

    <!-- Player Header --> 

    <LinearLayout 
     android:id="@+id/player_header_bg" 
     android:layout_width="fill_parent" 
     android:layout_height="60dip" 
     android:layout_alignParentTop="true" 
     android:paddingLeft="5dp" 
     android:paddingRight="5dp" > 

     <!-- Audio Title --> 

     <TextView 
      android:id="@+id/audioTitle" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="10dp" 
      android:layout_weight="1" 
      android:paddingLeft="10dp" 
      android:text="1" 
      android:textColor="#04b3d2" 
      android:textSize="16dp" 
      android:textStyle="bold" /> 

     <!-- Playlist button --> 

     <ImageButton 
      android:id="@+id/btnPlaylist" 
      android:layout_width="wrap_content" 
      android:layout_height="fill_parent" 
      android:background="@null" 
      android:src="@drawable/btn_playlist" /> 
    </LinearLayout> 

    <!-- Sabak Image --> 

    <LinearLayout 
     android:id="@+id/AudioThumbnail" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:gravity="center" 
     android:paddingBottom="10dp" 
     android:paddingTop="50dp" > 

     <ImageView 
      android:layout_width="wrap_content" 
      android:layout_height="200dp" 
      android:layout_weight="1.04" 
      android:src="@drawable/fatiha" /> 
    </LinearLayout> 

    <!-- Player Footer --> 

    <LinearLayout 
     android:id="@+id/player_footer_bg" 
     android:layout_width="fill_parent" 
     android:layout_height="100dp" 
     android:layout_alignParentBottom="true" 
     android:gravity="center" > 

     <!-- Player Buttons --> 

     <LinearLayout 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:gravity="center_vertical" 
      android:orientation="horizontal" 
      android:paddingLeft="10dp" 
      android:paddingRight="10dp" > 

      <!-- Previous Button --> 
      <!-- Backward Button --> 

      <ImageButton 
       android:id="@+id/btnBackward" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:background="@null" 

       android:src="@drawable/btn_backward" /> 
      <!-- Play Button --> 

      <ImageButton 
       android:id="@+id/pause_button" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:background="@null" 
       android:clickable="false" 
       android:src="@drawable/btn_pause" /> 

      <ImageButton 
       android:id="@+id/play_button" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:background="@null" 
       android:layout_toLeftOf="@+id/btnBackward" 
        android:layout_toRightOf="@+id/btnForward" 
       android:src="@drawable/btn_play" 
       /> 

      <!-- Forward Button --> 

      <ImageButton 
       android:id="@+id/btnForward" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:background="@null" 
       android:src="@drawable/btn_forward" /> 

      <!-- Next Button --> 

     </LinearLayout> 
    </LinearLayout> 

    <!-- SABAK Progress Bar/Seek bar --> 


    <!-- Timer Display --> 


    <!-- Repeat/Shuffle buttons --> 
    <!-- Repeat/Shuffle buttons --> 

    <LinearLayout 
     android:id="@+id/linearLayout1" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_above="@id/player_footer_bg" 
     android:gravity="center" 
     android:orientation="vertical" > 

     <!-- Link to recordsabak Screen --> 

     <SeekBar 
      android:id="@+id/audioProgressBar" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="10dp" 
      android:layout_marginLeft="20dp" 
      android:layout_marginRight="20dp" 
      android:layout_weight="1" 
      android:paddingLeft="6dp" 
      android:paddingRight="6dp" 
      android:paddingTop="10dp" 
      android:progressDrawable="@drawable/seekbar_progress" 
      android:thumb="@drawable/seek_handler" /> 

    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/timerDisplay" 
     android:orientation="horizontal" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_alignParentLeft="true" 
     android:layout_below="@+id/AudioThumbnail" > 
    </LinearLayout> 

    <ImageButton 
     android:id="@+id/imageButton10" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_above="@+id/linearLayout1" 
     android:layout_marginRight="33dp" 
     android:layout_toLeftOf="@+id/imageButton2" 
     android:background="@null" 
     android:src="@drawable/mic5" /> 

    <ImageButton 
     android:id="@+id/imageButton2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_above="@+id/linearLayout1" 
     android:layout_alignParentRight="true" 
     android:layout_marginRight="104dp" 
     android:background="@null" 
     android:src="@drawable/btn_shuffle" /> 

</RelativeLayout>

艙單

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.example.hareemaudio" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="19" /> 

    <application 
     android:allowBackup="true" 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name="com.example.hareemaudio.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>

來源

2014-09-12 LittleGirl

42行期待一個整數，它的不存在。 – durbnpoisn 2014-09-12 20:49:17

第42行是** seek_bar.setMax（player.getDuration（））; **我該怎麼改變？ – LittleGirl 2014-09-12 20:54:50

只是改變'R.id.seek_bar'到'R.id.audioProgressBar'裏面'getInit（）' – 2014-09-12 20:58:04

有一兩件事，我可以看到的是，您在getInit()的java文件中使用R.id.seek_bar。但是在xml文件中沒有這個名字的android:id。這可能會返回null。嘗試改變它R.id.audioProgressBar

來源

2014-09-12 20:52:06

謝謝你.....你讓我的一天:) – LittleGirl 2014-09-12 21:10:03

在你的xml中你有audioProgressBar，在你的java代碼中你有seek_bar，是seek_bar在一些其他的活動？

變化：

seek_bar = (SeekBar) findViewById(R.id.seek_bar);

到

seek_bar = (SeekBar) findViewById(R.id.audioProgressBar);

來源

2014-09-12 20:53:13

是的它的作品謝謝........... :) – LittleGirl 2014-09-12 21:10:28

我沒有prevelege接受多個答案.. :(但真的非常感謝所有解決我的問題:) – LittleGirl 2014-09-12 21:20:33

好吧麗莎，快樂編碼:) – 2014-09-15 06:17:38

致命例外 - 不幸的應用程序已停止工作

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