我的應用程序的原因是什麼原因每次都會關閉？

即時通訊設法制作一個音樂應用程序，只是讓我的列表視圖的歌曲列表和其收緊力量關閉。我剛纔提到的用戶權限讀取外部存儲隨後也...這裏是代碼我的應用程序的原因是什麼原因每次都會關閉？

package com.smp.ravirathore.music; 
import android.graphics.Typeface; 
import android.os.Environment; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.ArrayAdapter; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.TextView; 
import java.io.File; 
import java.util.ArrayList; 


public class FileList extends AppCompatActivity { 



TextView text_list; 
ImageView backimg; 
ListView listsongs; 
String[] genuinesongs; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_file_list); 
    backimg = (ImageView) findViewById(R.id.imageView); 
    text_list = (TextView) findViewById(R.id.text_list); 
    listsongs = (ListView) findViewById(R.id.list_songs); 
    Typeface font = Typeface.createFromAsset(getAssets(), "journal.ttf"); 
    text_list.setTypeface(font); 
    ArrayList<File> songs = find(Environment.getExternalStorageDirectory()); 
    genuinesongs = new String[songs.size()]; 
    for (int i = 0; i <= songs.size(); i++) { 

     genuinesongs[i] = songs.get(i).getName().toString().replace("mp3",""); 
    } 
    ArrayAdapter<String> adp = new ArrayAdapter<String>(getApplicationContext(),R.layout.activity_file_list, 
    R.id.text_list, genuinesongs); 
    listsongs.setAdapter(adp); 
} 

public ArrayList<File> find(File root){ 
    ArrayList<File> arrayList = new ArrayList<File>(); 
    File[] files = root.listFiles(); 
    for(File single : files){ 
     if(single.isDirectory() && !single.isHidden()){ 
      arrayList.addAll(find(single)); 
     } 
     else{ 
      if(single.getName().endsWith(".mp3") || single.getName().endsWith(".wav")){ 
      arrayList.add(single); 
     } 
    } 


} 
    return arrayList; 
} 


@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_file_list, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
}}

而且我都用下面給出

activity_file_list.xml的XML文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".FileList"> 

    <ListView 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:id="@+id/list_songs" 
     /> 

</RelativeLayout>

word_layout.xml

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

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:textColor="#bdbdbd" 
     android:text="Hello" 
     android:id="@+id/text_list" 
     android:padding="10dp" /> 
</LinearLayout>

最後我的AndroidMenifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.smp.ravirathore.music" > 
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 

    <application 
     android:allowBackup="true" 
     android:icon="@mipmap/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".FileList"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest>

這裏是logcat的：

09-24 16:08:43.105 7201-7201/com.smp.ravirathore.music D/dalvikvm﹕ Late-enabling CheckJNI 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music D/AndroidRuntime﹕ Shutting down VM 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x64d62b20) 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music W/System.err﹕ java.io.FileNotFoundException: /data/data/.tmp/.crashed_app: open failed: EACCES (Permission denied) 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music W/System.err﹕ at libcore.io.IoBridge.open(IoBridge.java:409) 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music D/AndroidRuntime﹕ procName from cmdline: com.smp.ravirathore.music 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music E/AndroidRuntime﹕ in writeCrashedAppName, pkgName :com.smp.ravirathore.music 
09-24 16:08:43.365 7201-7201/com.smp.ravirathore.music E/AndroidRuntime﹕ FileNotFoundException while trying to write in crash app file 
09-24 16:08:43.375 7201-7201/com.smp.ravirathore.music W/System.err﹕ at java.io.FileOutputStream.<init>(FileOutputStream.java:88) 
09-24 16:08:43.455 7216-7216/com.smp.ravirathore.music D/dalvikvm﹕ Late-enabling CheckJNI 
09-24 16:08:43.535 7216-7216/com.smp.ravirathore.music D/AndroidRuntime﹕ Shutting down VM 
09-24 16:08:43.535 7216-7216/com.smp.ravirathore.music W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x64d62b20) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music D/AndroidRuntime﹕ procName from cmdline: com.smp.ravirathore.music 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music E/AndroidRuntime﹕ in writeCrashedAppName, pkgName :com.smp.ravirathore.music 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ java.io.FileNotFoundException: /data/data/.tmp/.crashed_app: open failed: EACCES (Permission denied) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at libcore.io.IoBridge.open(IoBridge.java:409) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at java.io.FileOutputStream.<init>(FileOutputStream.java:88) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at java.io.FileOutputStream.<init>(FileOutputStream.java:73) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at java.io.FileWriter.<init>(FileWriter.java:42) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at com.android.internal.os.RuntimeInit.writeCrashedAppName(RuntimeInit.java:145) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at com.android.internal.os.RuntimeInit.sendCrashReport(RuntimeInit.java:134) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at com.android.internal.os.RuntimeInit.access$100(RuntimeInit.java:53) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:80) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693) 
09-24 16:08:43.545 7216-7216/com.smp.ravirathore.music W/System.err﹕ at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)

感謝您的幫助了！

來源

2015-09-24 Ravi Rathore

添加您的logcat錯誤 –

你「的TextView」是在不同的佈局文件比你'ListView'和您的訪問，在'.FIleList'因此被強制關閉 –

所以我應該放在哪裏呢？？我希望文本字體在列表視圖項 –

在你的活動中移除文本查看參考，一切有關的TextView和更新text_list

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_file_list); 
     backimg = (ImageView) findViewById(R.id.imageView); 
     listsongs = (ListView) findViewById(R.id.list_songs); 
     ArrayList<File> songs = find(Environment.getExternalStorageDirectory()); 
     genuinesongs = new String[songs.size()]; 
     for (int i = 0; i <= songs.size(); i++) { 

      genuinesongs[i] = songs.get(i).getName().toString().replace("mp3",""); 
     } 
     **UPDATED Adapter** 
     ListAdapter adp = new ListAdapter(getApplicationContext(), genuinesongs); 
     listsongs.setAdapter(adp); 
    }

修訂 textlistrow.xml

<?xml version="1.0" encoding="utf-8"?> 
    <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:textColor="#bdbdbd" 
      android:text="Hello" 
      android:id="@+id/text_item" 
      android:padding="10dp" />

因爲如果你添加自定義字體 需要添加字體到textview，你ed創建custom_item_layout並將其與Custom適配器配合使用，並在getView()方法中設置字體。像

public class ListAdapter extends ArrayAdapter<String> { 
String[] items; 
    public ListAdapter(Context context,String[] items) { 
     super(context,R.layout.itemlistrow,items); 
     this.items=items; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     View v = convertView; 

     if (v == null) { 
      LayoutInflater vi; 
      vi = LayoutInflater.from(getContext()); 
      v = vi.inflate(R.layout.itemlistrow, null); //inflate the list_row 
     } 


      TextView tv= (TextView) v.findViewById(R.id.textitem); 
      Typeface font = Typeface.createFromAsset(getAssets(), "journal.ttf"); 
tv.setTypeface(font); 
      tv.setText(items[position]); 

     } 

     return v; 
    } 

}

來源

2015-09-24 05:02:03

Thnxx但是如何添加字體?? –

檢查是否更新了列表項名稱，文本視圖的id，以及onCreate中的Adpater –

它的顯示arrayadapter（Context，int）不能應用於arrayadapter（Context，java.string []） –

我的應用程序的原因是什麼原因每次都會關閉？

回答

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