android :(坏)布局背景图像质量低

Question

在我发布这个问题之前,我尝试了在Android部分找到的所有答案,但没有任何成功......
出于某种原因,设备中的图像质量很差,在Eclipse和虚拟设备中
看起来非常好看截图示例: 示例http://img714.imageshack.us/img714/1358/84044294.jpg

我该怎么办？我尝试用72dpi和300 dpi制作图像,PNG/JPG分辨率为1280x800, 但没有任何作用......
请帮忙!!

这是我的LiveNewsActivity.java也许我做错了什么？

package com.prog.livenews;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;


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

//############################
//######### VARS #############

Button login;
Button register;

//############################
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test);
    getWindow().setFormat(PixelFormat.RGBA_8888);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER);

    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inPreferredConfig = Bitmap.Config.ARGB_8888;
    Bitmap gradient = BitmapFactory.decodeResource(getResources(), R.drawable.bg, options);

    findViewById(R.id.frameLayout1).setBackgroundDrawable(new BitmapDrawable(gradient));

    login = (Button) findViewById(R.id.main_login_button);
    register = (Button) findViewById(R.id.main_register_button);



    login.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            startActivity(new Intent("com.prog.livenews.LOGIN"));
        }
    });

    register.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            startActivity(new Intent("com.prog.livenews.REGISTER"));
        }
    });


}

}

Answer 1

试试吧:

将它放在第一个活动的setContentView(layoutId)之前

getWindow().setFormat(PixelFormat.RGBA_8888);

在你的第一个活动中调用setContentView(layoutId)后,你把下面的代码:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
options.inDither = true;
options.inScaled = false;
options.inDither = false;
options.inPurgeable = true;
Bitmap preparedBitmap = BitmapFactory.decodeResource(yourAppName.getSharedApplication().getResources(),
            R.drawable.bg, options);
    Drawable background = new BitmapDrawable(preparedBitmap);
    ((LinearLayout) findViewById(R.id.yourLayoutId))
        .setBackgroundDrawable(background);

并且你把你的xml图像放在res/drawable"如果你有xml图像"文件夹和png,jpeg和其他普通图像放在res/drawable-hdpi文件夹中.

希望这可以帮助.