package com.dk.demo.matrix; import android.app.Activity; import android.graphics.Matrix; import android.os.Bundle; import android.widget.ImageView; import android.widget.ImageView.ScaleType; public class MatrixActivity extends Activity { public static final String KEY_ACTION = "KEY_ACTION"; public static final int ACTION_ROTATE = 101; public static final int ACTION_TRANSLATE = 102; public static final int ACTION_SCALE = 103; public static final int ACTION_SKEW = 104; private ImageView mImageView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_matrix); mImageView = (ImageView) findViewById(R.id.image); mImageView.setScaleType(ScaleType.MATRIX); updateMatrix(getIntent().getIntExtra(KEY_ACTION, -1)); } private void updateMatrix(int action) { Matrix matrix = new Matrix(); switch (action) { case ACTION_ROTATE: matrix.postRotate(45, 450, 450); break; case ACTION_TRANSLATE: matrix.postTranslate(250, 250); break; case ACTION_SCALE: matrix.postScale(1 / 2f, 2, 100, 100); break; case ACTION_SKEW: matrix.postSkew(0.2f, 0.2f, 100, 100); break; default: break; } mImageView.setImageMatrix(matrix); } }