018_03简易美图

package com.example.day18_03simplemeitu;

import android.app.Activity;
import android.graphics.ColorMatrixColorFilter;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends Activity implements OnSeekBarChangeListener{

    private ImageView iv_photo;
    private SeekBar sb_red;
    private SeekBar sb_green;
    private SeekBar sb_blue;
    private SeekBar sb_rgb;
    private float[] arrays;
    private ColorMatrixColorFilter cf;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        iv_photo = (ImageView) findViewById(R.id.iv_photo);
        iv_photo.setImageResource(R.drawable.dd);
                
        sb_red = (SeekBar) findViewById(R.id.sb_red);
        sb_green = (SeekBar) findViewById(R.id.sb_green);
        sb_blue = (SeekBar) findViewById(R.id.sb_blue);
        sb_rgb = (SeekBar) findViewById(R.id.sb_rgb);
    
        sb_red.setMax(255);
        sb_green.setMax(255);
        sb_blue.setMax(255);
        sb_rgb.setMax(255);

        arrays = new float[] {        1, 0, 0, 0, 0,// red     1*R + 0*G + 0*B + 0*A + 0
                                      0, 1, 0, 0, 0,// green 0*R + 1*G + 0*B + 0*A + 0
                                      0, 0, 1, 0, 0,// blue     0*R + 0*G + 1*B + 0*A + 0
                                      0, 0, 0, 1, 0};

        cf = new ColorMatrixColorFilter(arrays);

        iv_photo.setColorFilter(cf);
                
        sb_red.setOnSeekBarChangeListener(this);
        sb_green.setOnSeekBarChangeListener(this);
        sb_blue.setOnSeekBarChangeListener(this);
        sb_rgb.setOnSeekBarChangeListener(this);
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        
        int id =seekBar.getId();
        switch (id) {
        case R.id.sb_red:
            System.out.println("MainActivity.onProgressChanged() sb_red"+progress);
            arrays[4] =progress;    
            break;
            
        case R.id.sb_green:
            System.out.println("MainActivity.onProgressChanged() sb_green"+progress);
            arrays[9] =progress;
            break;
        case R.id.sb_blue:
            System.out.println("MainActivity.onProgressChanged() sb_blue"+progress);
            arrays[14] =progress;
            break;
        case R.id.sb_rgb:
            System.out.println("MainActivity.onProgressChanged() sb_rgb"+progress);
            arrays[4] =progress;
            arrays[9] =progress;
            arrays[14] =progress;
 
            break;
        default:
            break;
        }
        cf = new ColorMatrixColorFilter(arrays);
        iv_photo.setColorFilter(cf);
    }

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

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

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.day18_03simplemeitu.MainActivity"
    android:orientation="vertical" >

  <SeekBar 
     android:id="@+id/sb_red"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     />
  <SeekBar 
     android:id="@+id/sb_green"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     />
  <SeekBar 
     android:id="@+id/sb_blue"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     />
  <SeekBar 
     android:id="@+id/sb_rgb"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     />
  <ImageView
      android:id="@+id/iv_photo"
      android:layout_width="wrap_content"
     android:layout_height="wrap_content"
      />
</LinearLayout>