程序强制关闭
这是我的 PlayerActivity:
package player.org;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.MediaController;
import android.app.Activity;
import android.os.Bundle;
public class PlayerActivity extends Activity {
/** Called when the activity is first created. */
private MediaView media=new MediaView(this);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(media);
}
}
这是我的 MediaView:
package player.org;
import android.app.Activity;
import android.view.*;
import android.widget.ImageView;
import android.content.*;
import android.content.*;
import android.graphics.Color;
class MediaView extends View
{
public MediaView(Context context)
{
super(context);
setBackgroundColor(Color.WHITE);
}
}
这是我的清单:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="player.org"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity
android:name=".MediaView"
android:label="@string/MediaView_title">
</activity>
<activity android:name=".PlayerActivity"
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>
但是当我启动应用程序时,它会强制关闭。
您有什么建议吗? 感谢您的回答
Here is my PlayerActivity:
package player.org;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.MediaController;
import android.app.Activity;
import android.os.Bundle;
public class PlayerActivity extends Activity {
/** Called when the activity is first created. */
private MediaView media=new MediaView(this);
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(media);
}
}
here is my MediaView:
package player.org;
import android.app.Activity;
import android.view.*;
import android.widget.ImageView;
import android.content.*;
import android.content.*;
import android.graphics.Color;
class MediaView extends View
{
public MediaView(Context context)
{
super(context);
setBackgroundColor(Color.WHITE);
}
}
and here is my manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="player.org"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="10" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity
android:name=".MediaView"
android:label="@string/MediaView_title">
</activity>
<activity android:name=".PlayerActivity"
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>
But when I Launch the app., It force closes.
Do you have any suggestions?
Thanks for your answers
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您正在编写此行
private MediaView media=new MediaView(this);
,在 Activity 启动之前。因此'this'
关键字强制关闭您的应用程序请像这样使用
You are writing this line
private MediaView media=new MediaView(this);
,before the Activity is initiated.So'this'
keyword is force closing your applicationPlease use like this