android - 设置背景图片代码

Question

  ImageView im1_b;
    im1_b = (ImageView)findViewById(R.id.b_01_b);
    im1_b.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            AlertDialog.Builder builder = new AlertDialog.Builder(Next_2Activity.this);
            builder.setTitle("Project Gmelon");
            builder.setMessage("Are you sure set Wallpaper?");
            builder.setNegativeButton("NO", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
               Toast.makeText(getApplicationContext(),
                       "You Select NO", Toast.LENGTH_LONG) .show();
                }
            });
            builder.setPositiveButton("YES", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {

                    WallpaperManager myWallpaperManager
                    = WallpaperManager.getInstance(getApplicationContext());
                   try {
                    myWallpaperManager.setResource(R.drawable.b_01_i);
                   } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                   }
                    Toast.makeText(getApplicationContext(),
                           "Setting Complete, Thanks.", Toast.LENGTH_LONG) .show();
                }

            });

            builder.show();
        }
    });

我写了这样的代码来设置墙纸..但是

我的形象是这样设置的。( http://wemakeucc.com/1.jpg )

我想要这样.. ( http://wemakeucc.com/2.JPG )

我能怎么做..？

编辑1>

ImageView im1_b;
im1_b = (ImageView)findViewById(R.id.b_01_b);
im1_b.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
im1_b.setOnClickListener(new OnClickListener() {

Answer 1

如果你想在代码中做到这一点，你可以这样做：

YOUR_IMAGE_VIEW.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

如果您愿意，您可以选择尝试其他比例类型而不是 CENTER_INSIDE！

如果要在 xml 中执行此操作，请使用所需的比例类型设置 scaleType 属性：

android:scaleType="centerInside"

检查此链接以了解秤类型：秤类型