Android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？
