【新手求救】使用全局对象出现Source Not Found错误

[wang2245]

我将全局对象放在ray.global.centa里，代码如下：

package ray.global.centa;

import android.app.Application;

public class Screen extends Application {
	
	public int Screen_Width;
	public int Screen_Heigh;
	
}

然后在另一个package里引用：

package ray.app.centa;

import android.app.Activity;
import android.os.Bundle;
import android.util.DisplayMetrics;


public class CentaPhoneAppActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        ray.global.centa.Screen screen = (ray.global.centa.Screen)getApplicationContext();
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        
        //screen.Screen_Width = dm.widthPixels;
        //screen.Screen_Width = dm.heightPixels;
    }
}

一运行结果就杯具了，出错，退出。调试后的错误信息是：Source Not Find

有劳各位大侠出手相助！谢谢！

[Marco_Lee]

manifest中，application设置了name属性了吗？