get Bitmap from View's size - Android User Interface

Android examples for User Interface:View Bitmap

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Description

get Bitmap from View's size

Demo Code


import java.util.ArrayList;
import java.util.List;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.ViewGroup;
import android.widget.TextView;

public class Main{
    public static Bitmap getBitmap(View focus, int newWidth, int newHeight) {
        int oldWidth = focus.getWidth();
        int oldHeight = focus.getHeight();
        int oldLeft = focus.getLeft();
        int oldTop = focus.getTop();
        int oldWSpec = ReflectUtil.getIntFieldValue(View.class, focus,
                "mOldWidthMeasureSpec");
        int oldHSpec = ReflectUtil.getIntFieldValue(View.class, focus,
                "mOldHeightMeasureSpec");

        int w = newWidth;
        int h = newHeight;
        if (w == 0 || h == 0) {
            return null;
        }//from  www. j ava2 s . c  om
        Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
        int newWSpec = MeasureSpec.makeMeasureSpec(w, MeasureSpec.EXACTLY);
        int newHSpec = MeasureSpec.makeMeasureSpec(h, MeasureSpec.EXACTLY);
        focus.measure(newWSpec, newHSpec);
        focus.layout(0, 0, w, h);
        focus.draw(new Canvas(bitmap));

        // restore previous state.
        focus.measure(oldWSpec, oldHSpec);
        focus.layout(oldLeft, oldTop, oldLeft + oldWidth, oldTop
                + oldHeight);

        //        Log.d(TAG, "bitmap w: " + bitmap.getWidth() + " h: " + bitmap.getHeight());
        return bitmap;
    }
}

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