Android 仿美图秀秀颜色混合

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="青----------------红" />

<SeekBar
android:id="@+id/skb_red"
android:progress="50"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="紫----------------绿" />

<SeekBar
android:id="@+id/skb_green"
android:progress="50"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="黄----------------蓝" />

<SeekBar
android:id="@+id/skb_blue"
android:progress="50"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>

public class MainActivity extends Activity implements OnSeekBarChangeListener {

private ImageView iv;
private SeekBar skbRed;
private SeekBar skbGreen;
private SeekBar skbBlue;
private float redPerent = 1;
private float greenPerent = 1;
private float bluePerent = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

iv = (ImageView) findViewById(R.id.iv);
skbRed = (SeekBar) findViewById(R.id.skb_red);
skbGreen = (SeekBar) findViewById(R.id.skb_green);
skbBlue = (SeekBar) findViewById(R.id.skb_blue);

skbRed.setOnSeekBarChangeListener(this);
skbGreen.setOnSeekBarChangeListener(this);
skbBlue.setOnSeekBarChangeListener(this);

// 给iv加载图片
Bitmap bitmap = BitmapFactory.decodeFile("/mnt/sdcard/img_small_1.jpg");
iv.setImageBitmap(bitmap);

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub

}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// 释放的时候
int progress = seekBar.getProgress();// 0-100
float perent = progress / 50f;

Bitmap srcBitmap = BitmapFactory
.decodeFile("/mnt/sdcard/img_small_1.jpg");

// 1. 创建拷贝
Bitmap copyBitmap = Bitmap.createBitmap(srcBitmap.getWidth(),
srcBitmap.getHeight(), srcBitmap.getConfig());

// 2. 将拷贝挂载到画布上
Canvas canvas = new Canvas(copyBitmap);

// 3. 需要画笔
Paint paint = new Paint();

if (seekBar == skbRed) {
redPerent = perent;
} else if (seekBar == skbGreen) {
greenPerent = perent;
} else if (seekBar == skbBlue) {
bluePerent = perent;
}

ColorMatrix cm = new ColorMatrix();
cm.set(new float[] { 1 * redPerent, 0, 0, 0, 0,// R-->红色-->(0-2)
0, 1 * greenPerent, 0, 0, 0,// G-->绿色
0, 0, 1 * bluePerent, 0, 0,// B-->蓝色
0, 0, 0, 1, 0 // A -->透明度
});
ColorMatrixColorFilter filter = new ColorMatrixColorFilter(cm);
paint.setColorFilter(filter);// 颜色过滤器

// 4. 对图像进行处理的参数配置
Matrix matrix = new Matrix();

// 5. 将原始图片按照自己的配置方式画到画布上
canvas.drawBitmap(srcBitmap, matrix, paint);

iv.setImageBitmap(copyBitmap);
}
}