android java.lang.IllegalStateException当我想创建一个新的活动

Question

我有下面列出的例外，我添加了代码，在创建这个问题之前我GOOGLE了这个问题，但没有找到解决方案，我找不到该问题或任何帮助与同一错误ohter帖子，所以我失踪？

仿真器Android版2.2 API级别8

这里的问题是：

07-07 19:40:20.782: E/AndroidRuntime(588): FATAL EXCEPTION: main 
07-07 19:40:20.782: E/AndroidRuntime(588): java.lang.IllegalStateException: Could not execute method of the activity 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.view.View$1.onClick(View.java:2072) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.view.View.performClick(View.java:2408) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.view.View$PerformClick.run(View.java:8816) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.os.Handler.handleCallback(Handler.java:587) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.os.Handler.dispatchMessage(Handler.java:92) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.os.Looper.loop(Looper.java:123) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-07 19:40:20.782: E/AndroidRuntime(588): at java.lang.reflect.Method.invokeNative(Native Method) 
07-07 19:40:20.782: E/AndroidRuntime(588): at java.lang.reflect.Method.invoke(Method.java:521) 
07-07 19:40:20.782: E/AndroidRuntime(588): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-07 19:40:20.782: E/AndroidRuntime(588): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-07 19:40:20.782: E/AndroidRuntime(588): at dalvik.system.NativeStart.main(Native Method) 
07-07 19:40:20.782: E/AndroidRuntime(588): Caused by: java.lang.reflect.InvocationTargetException 
07-07 19:40:20.782: E/AndroidRuntime(588): at app.hearts.multiplayer.MainActivity.onPlayClick(MainActivity.java:24) 
07-07 19:40:20.782: E/AndroidRuntime(588): at java.lang.reflect.Method.invokeNative(Native Method) 
07-07 19:40:20.782: E/AndroidRuntime(588): at java.lang.reflect.Method.invoke(Method.java:521) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.view.View$1.onClick(View.java:2067) 
07-07 19:40:20.782: E/AndroidRuntime(588): ... 11 more 
07-07 19:40:20.782: E/AndroidRuntime(588): Caused by: java.lang.SecurityException: Permission Denial: starting Intent { cmp=app.hearts.multiplayer/.GameActivity } from ProcessRecord{44fc09f0 588:app.hearts.multiplayer/10032} (pid=588, uid=10032) requires android.permission.ACCESS_NETWORK_STATE 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.os.Parcel.readException(Parcel.java:1247) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.os.Parcel.readException(Parcel.java:1235) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1298) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1373) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.app.Activity.startActivityForResult(Activity.java:2817) 
07-07 19:40:20.782: E/AndroidRuntime(588): at android.app.Activity.startActivity(Activity.java:2923) 
07-07 19:40:20.782: E/AndroidRuntime(588): ... 15 more 

MainActivity.java：

package app.hearts.multiplayer; 

import android.os.Bundle; 
import android.app.Activity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View;  
import android.widget.EditText; 

public class MainActivity extends Activity { 

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
} 



public void onPlayClick(View view) 
{ 
    Intent gameIntent = new Intent(MainActivity.this, GameActivity.class); 
    startActivity(gameIntent); 
} 
} 

activity_main.xml中：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/LinearLayout2" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:background="@drawable/background" 
    android:gravity="right" 
    android:orientation="horizontal" > 

    <ImageView 
     android:id="@+id/imageView1" 
     android:layout_width="0dp" 
     android:layout_height="match_parent" 
     android:layout_weight="1.05" 
     android:scaleType="fitXY" 
     android:src="@drawable/hearts_hat" /> 

    <LinearLayout 
     android:id="@+id/LinearLayout1" 
     android:layout_width="0dp" 
     android:layout_height="match_parent" 
     android:layout_weight="0.70" 
     android:orientation="vertical" 
     android:paddingRight="@dimen/padding_small" 
     android:paddingTop="@dimen/padding_large" > 


     <ImageButton 
      android:id="@+id/button1" 
      android:layout_width="wrap_content" 
      android:layout_height="48dp" 
      android:layout_weight="0.00" 
      android:adjustViewBounds="true" 
      android:background="@drawable/select_play" 
      android:onClick="onPlayClick" 
      android:clickable="true" 
      android:paddingTop="@dimen/padding_medium" /> 

     <TableRow 
      android:id="@+id/tableRow1" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:paddingBottom="@dimen/padding_large" 
      android:paddingTop="@dimen/padding_large" > 
     </TableRow> 

     <ImageButton 
      android:id="@+id/button2" 
      android:layout_width="wrap_content" 
      android:layout_height="48dp" 
      android:layout_weight="0.00" 
      android:background="@drawable/select_highscore" 
      android:clickable="true" 
      android:paddingTop="@dimen/padding_large" /> 
    </LinearLayout> 

</LinearLayout> 

Manife ST-文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="app.hearts.multiplayer" 
    android:versionCode="1" 
    android:versionName="1.0" > 

    <uses-sdk 
     android:minSdkVersion="8" 
     android:targetSdkVersion="15" /> 

    <application 
     android:icon="@drawable/hearts_icon" 
     android:label="@string/app_name" 
     android:permission="android.permission.ACCESS_NETWORK_STATE" 
     android:theme="@style/AppTheme" > 
     <activity 
      android:name=".MainActivity" 
      android:label="@string/title_activity_main" 
      android:screenOrientation="landscape" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <activity 
      android:name=".GameActivity" 
      android:label="@string/title_activity_game" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

</manifest> 

GameActivity.java：

package app.hearts.multiplayer; 

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.support.v4.app.NavUtils; 

public class GameActivity extends Activity { 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_game); 
    } 

} 

activity_game.xml：

<?xml version="1.0" encoding="utf-8"?> 
<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" > 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:padding="@dimen/padding_medium" 
     android:text="@string/hello_world" 
     tools:context=".GameActivity" /> 

</RelativeLayout> 

Answer 1

从下面的错误：

07-07 19:40:20.782: E/AndroidRuntime(588): Caused by: java.lang.SecurityException: Permission Denial: starting Intent { cmp=app.hearts.multiplayer/.GameActivity } from ProcessRecord{44fc09f0 588:app.hearts.multiplayer/10032} (pid=588, uid=10032) requires android.permission.ACCESS_NETWORK_STATE 

好像你需要添加ACCESS_NETWORK_STAT

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

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" > 
     <!-- more data goes here... --> 
    </application> 

</manifest> 

试试看： - 电子使用下面的代码应该是“应用程序”标签之外添加此权限。