调整位图图像？ [英] Resize Bitmap image?

问题描述

我想改变屏幕方向时，改变图像大小。我试着用下面的code，但它不能正常工作。

  @覆盖
公共无效onConfigurationChanged（配置NEWCONFIG）{
super.onConfigurationChanged（NEWCONFIG）;
    如果（newConfig.orientation == Configuration.ORIENTATION_PORTRAIT）{
            Toast.makeText（这一点，肖像，Toast.LENGTH_SHORT）.show（）;
    }否则如果（newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE）{
            MYIMAGE = Bitmap.createBitmap（BitmapFactory
                    由Matchi.com提供回到codeResource（this.getResources（），R.drawable.pic））;
            显示D =（（窗口管理器）getSystemService（WINDOW_SERVICE））
                    .getDefaultDisplay（）;            INT ScreenHeight = d.getHeight（）;
            INT屏幕宽度= d.getWidth（）;            位图ScaledImage = Bitmap.createScaledBitmap（MYIMAGE，屏幕宽度，ScreenHeight，
                             真正）;            ImageView的=（ImageView的）findViewById（R.id.imageView2）;
            imageview.setImageBitmap（ScaledImage）;
    }
}
 

解决方案

下面是code旋转或android系统重新尺寸图像

 公共类bitmaptest延伸活动{
    @覆盖
    公共无效的onCreate（捆绑冰柱）{
        super.onCreate（冰柱）;
        的LinearLayout linLayout =新的LinearLayout（本）;        //加载origial位图（500×500像素）
        位图bitmapOrg = BitmapFactory.de codeResource（getResources（）
               R.drawable.android）;        INT宽度= bitmapOrg.width（）;
        INT高度= bitmapOrg.height（）;
        INT newWidth = 200;
        INT newHeight = 200;        //计算比例 - 在这种情况下= 0.4f
        浮动scaleWidth =（（浮点）newWidth）/宽度;
        浮动scaleHeight =（（浮点）newHeight）/身高;        //用于操作createa矩阵
        字模=新的Matrix（）;
        //调整位图
        matrix.postScale（scaleWidth，scaleHeight）;
        //旋转位图
        matrix.postRotate（45）;        //重新创建新的位图
        位图resizedBitmap = Bitmap.createBitmap（bitmapOrg，0，0，
                          宽度，高度，矩阵，真）;        //使从位图可绘制允许设置位图
        //为ImageView的，ImageButton的或什么都
        BitmapDrawable BMD =新BitmapDrawable（resizedBitmap）;        ImageView的ImageView的=新ImageView的（本）;        //设置绘制对象上的ImageView
        imageView.setImageDrawable（BMD）;        //中心图像
        imageView.setScaleType（ScaleType.CENTER）;        //添加的ImageView的布局
        linLayout.addView（ImageView的，
                新LinearLayout.LayoutParams（
                      LayoutParams.FILL_PARENT，LayoutParams.FILL_PARENT
                ）
        ）;        //设置的LinearLayout作为内容查看
        的setContentView（linLayout）;
    }
}
 

I want to change the image size when changing screen orientation. I tried to use the following code, but it does not work.

@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
    if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
            Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
    } else if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
            myImage = Bitmap.createBitmap(BitmapFactory
                    .decodeResource(this.getResources(), R.drawable.pic));
            Display d = ((WindowManager)getSystemService(WINDOW_SERVICE))
                    .getDefaultDisplay();

            int ScreenHeight = d.getHeight();
            int ScreenWidth = d.getWidth();

            Bitmap ScaledImage = Bitmap.createScaledBitmap(myImage , ScreenWidth, ScreenHeight, 
                             true);

            imageview = (ImageView)findViewById(R.id.imageView2);
            imageview.setImageBitmap(ScaledImage);
    }
}

解决方案

Below is the code to rotate or re size your image in android

public class bitmaptest extends Activity {
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        LinearLayout linLayout = new LinearLayout(this);

        // load the origial BitMap (500 x 500 px)
        Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),
               R.drawable.android);

        int width = bitmapOrg.width();
        int height = bitmapOrg.height();
        int newWidth = 200;
        int newHeight = 200;

        // calculate the scale - in this case = 0.4f
        float scaleWidth = ((float) newWidth) / width;
        float scaleHeight = ((float) newHeight) / height;

        // createa matrix for the manipulation
        Matrix matrix = new Matrix();
        // resize the bit map
        matrix.postScale(scaleWidth, scaleHeight);
        // rotate the Bitmap
        matrix.postRotate(45);

        // recreate the new Bitmap
        Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
                          width, height, matrix, true);

        // make a Drawable from Bitmap to allow to set the BitMap
        // to the ImageView, ImageButton or what ever
        BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

        ImageView imageView = new ImageView(this);

        // set the Drawable on the ImageView
        imageView.setImageDrawable(bmd);

        // center the Image
        imageView.setScaleType(ScaleType.CENTER);

        // add ImageView to the Layout
        linLayout.addView(imageView,
                new LinearLayout.LayoutParams(
                      LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT
                )
        );

        // set LinearLayout as ContentView
        setContentView(linLayout);
    }
}

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