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？
