活動之間的導航沒有發生

Question

我正在嘗試在兩個活動之間導航，但應用程序崩潰並且要求強行關閉。

這裏是我的代碼： 1日活動

public class HelloWorldActivity extends Activity { 
/** Called when the activity is first created. */ 

//public boolean returnFlag = false; 
@Override 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Button YesButton = (Button) findViewById(R.id.button1); 
    YesButton.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View view) { 
      // TODO Auto-generated method stub 
    Intent myIntent = new Intent(view.getContext(),Activity2.class); 
      startActivity(myIntent); 
      finish(); 
      } 
    }); 


} 

第二個活動：

public class Activity2 extends Activity { 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.answerspage); 


    Button butTryAgain = (Button) findViewById(R.id.id_tryagain); 
    butTryAgain.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View view) { 
      // TODO Auto-generated method stub 
    Intent myIntent = new Intent(view.getContext(), HelloWorldActivity.class); 
      startActivity(myIntent); 
      finish(); 
     } 
    }); 
} 

} 

的main.xml - HelloWorldActivity的

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

android:layout_height="wrap_content"android:textAppearance="? 

android:attr/textAppearanceLarge" android:id="@+id/textView1"   `android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="27dp" android:text="Welcome"></TextView>` 
<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" `android:textAppearance="?android:attr/textAppearanceMedium" android:id="@+id/textView2" android:text="Is your question ready??" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:layout_marginTop="29dp"></TextView>` 
<Button android:text="Yes" android:layout_width="wrap_content" `android:layout_height="wrap_content" android:id="@+id/button1" android:layout_alignBaseline="@+id/button2" android:layout_alignBottom="@+id/button2" android:layout_alignLeft="@+id/textView2" android:layout_marginLeft="36dp"></Button>` 
<Button android:text="No" android:layout_width="wrap_content" 

android:layout_height="wrap_content" android:id="@+id/button2" `android:layout_below="@+id/textView2" android:layout_alignRight="@+id/textView2" android:layout_marginRight="38dp" android:layout_marginTop="54dp"></Button>` 
</RelativeLayout> 

answerspage.xml - 活性2的xml文件

 <?xml version="1.0" encoding="utf-8"?> 
    <RelativeLayout android:id="@+id/FrameLayout1" `xmlns:android="http://schemas.android.com/apk/res/android"` 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     > 
     <Button android:layout_width="wrap_content" 

android:layout_height="wrap_content" android:text="Try again" android:id="@+id/button1" `android:layout_alignBaseline="@+id/id_tryagain" android:layout_alignBottom="@+id/button2"` `android:layout_alignParentLeft="true" android:layout_marginLeft="68dp"></Button>` 


     <Button android:layout_height="wrap_content" android:text="Quit" `android:id="@+id/button2" android:layout_alignParentTop="true" android:layout_toRightOf="@+id/id_quit" android:layout_marginLeft="29dp" android:layout_marginTop="127dp" android:layout_width="wrap_content"></Button>` 
     <TextView android:layout_width="wrap_content" `android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:id="@+id/textView1" android:text="TextView" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:layout_marginTop="46dp" android:editable="true"></TextView>` 
    </RelativeLayout>  

這是我的Manifest.xml

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

<application android:icon="@drawable/icon" android:label="@string/app_name"> 
    <activity android:name=".HelloWorldActivity" 
       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=".Activity2"></activity> 
</application> 
</manifest> 


I have gone through http://www.warriorpoint.com/blog/2009/05/24/android-how-to-switch-between-activities/ to implement the same 

Answer 1

在OnClick方法，你不應該使用view.getContext（）開始的意圖。 相反，使用：

Intent myIntent = new Intent(HelloWorldActivity.this,Activity2.class); 

爲HelloWorldActivity和

Intent myIntent = new Intent(Activity2.this, HelloWorldActivity.class); 

的活性2

Answer 2

您正在使用的情況下是錯誤的。

嘗試這樣做

public class HelloWorldActivity extends Activity { 
/** Called when the activity is first created. */ 

private Context context = null; 

//public boolean returnFlag = false; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    // Set the context here 
    context = getApplicationContext(); 

    Button YesButton = (Button) findViewById(R.id.button1); 
    YesButton.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View view) { 
      // TODO Auto-generated method stub 
      Intent myIntent = new Intent(context ,Activity2.class); 
      startActivity(myIntent); 
      finish(); 
     } 
    }); 


} 

希望這有助於。