Android学习记录（10）—Android之图片颜色处理

你想做到跟美图秀秀一样可以处理自己的照片，美化自己的照片吗？其实你也可以自己做一个这样的软件，废话不多说了，直接上图，上代码了！

效果图如下：

没处理前：



处理之后：



MainActivity.java的代码如下：

package net.loonggg.test;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends Activity {
private SeekBar sb1, sb2, sb3, sb4, sb5;
private ImageView iv;
private Bitmap bitmap, updateBitmap;
private Canvas canvas;
private Paint paint;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv = (ImageView) findViewById(R.id.iv);
sb1 = (SeekBar) findViewById(R.id.sb1);
sb2 = (SeekBar) findViewById(R.id.sb2);
sb3 = (SeekBar) findViewById(R.id.sb3);
sb4 = (SeekBar) findViewById(R.id.sb4);
sb5 = (SeekBar) findViewById(R.id.sb5);

bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.b);

updateBitmap = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), bitmap.getConfig());
canvas = new Canvas(updateBitmap);
paint = new Paint();
final ColorMatrix cm = new ColorMatrix();
paint.setColorFilter(new ColorMatrixColorFilter(cm));
paint.setColor(Color.BLACK);
paint.setAntiAlias(true);
final Matrix matrix = new Matrix();
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);

/**
* RGB三原色 红色值的设置
*/
sb1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int progress = seekBar.getProgress();
cm.set(new float[] { progress / 128f, 0, 0, 0, 0,// 红色值
0, 1, 0, 0, 0,// 绿色值
0, 0, 1, 0, 0,// 蓝色值
0, 0, 0, 1, 0 // 透明度
});
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});

/**
* RGB三原色 绿色值的设置
*/
sb2.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int progress = seekBar.getProgress();
cm.set(new float[] { 1, 0, 0, 0, 0,// 红色值
0, progress / 128f, 0, 0, 0,// 绿色值
0, 0, 1, 0, 0,// 蓝色值
0, 0, 0, 1, 0 // 透明度
});
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});

/**
* RGB三原色 蓝色值的设置
*/
sb3.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int progress = seekBar.getProgress();
cm.set(new float[] { 1, 0, 0, 0, 0,// 红色值
0, 1, 0, 0, 0,// 绿色值
0, 0, progress / 128f, 0, 0,// 蓝色值
0, 0, 0, 1, 0 // 透明度
});
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});

/**
* RGB三原色 三个值都改变为设置饱和度（亮度）
*/
sb4.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int progress = seekBar.getProgress();
cm.set(new float[] { progress / 128f, 0, 0, 0, 0,// 红色值
0, progress / 128f, 0, 0, 0,// 绿色值
0, 0, progress / 128f, 0, 0,// 蓝色值
0, 0, 0, 1, 0 // 透明度
});
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});

/**
* RGB三原色 设置透明度
*/
sb5.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
int progress = seekBar.getProgress();
cm.set(new float[] { 1, 0, 0, 0, 0,// 红色值
0, 1, 0, 0, 0,// 绿色值
0, 0, 1, 0, 0,// 蓝色值
0, 0, 0, progress / 128f, 0 // 透明度
});
paint.setColorFilter(new ColorMatrixColorFilter(cm));
canvas.drawBitmap(bitmap, matrix, paint);
iv.setImageBitmap(updateBitmap);
}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {

}
});
}

}

布局文件代码如下：

<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:background="#CDCDCD"
android:orientation="vertical"
tools:context=".MainActivity" >

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

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="红色:"
android:textColor="#FF0000"
android:textSize="24sp" />

<SeekBar
android:id="@+id/sb1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="256"
android:progress="128" />
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="绿色:"
android:textColor="#00FF00"
android:textSize="24sp" />

<SeekBar
android:id="@+id/sb2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="256"
android:progress="128" />
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="蓝色:"
android:textColor="#0000FF"
android:textSize="24sp" />

<SeekBar
android:id="@+id/sb3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="256"
android:progress="128" />
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="饱和度:"
android:textColor="#000000"
android:textSize="16.5sp" />

<SeekBar
android:id="@+id/sb4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="256"
android:progress="128" />
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:padding="10dp" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="透明度:"
android:textColor="#000000"
android:textSize="16.5sp" />

<SeekBar
android:id="@+id/sb5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:max="256"
android:progress="128" />
</LinearLayout>

</LinearLayout>

到这里就完了，看明白了吗？

转载请注明出处：http://blog.csdn.net/loongggdroid/article/details/18708911