package com.example.androidimageview;
import android.support.v7.app.ActionBarActivity;
import android.graphics.PorterDuff.Mode;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
TextView textTitle;
ImageView image1;
SeekBar barR, barG, barB, barAlpha;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textTitle = (TextView)findViewById(R.id.title);
image1 = (ImageView)findViewById(R.id.image1);
barR = (SeekBar)findViewById(R.id.r);
barG = (SeekBar)findViewById(R.id.g);
barB = (SeekBar)findViewById(R.id.b);
barAlpha = (SeekBar)findViewById(R.id.alpha);
barR.setOnSeekBarChangeListener(myOnSeekBarChangeListener);
barG.setOnSeekBarChangeListener(myOnSeekBarChangeListener);
barB.setOnSeekBarChangeListener(myOnSeekBarChangeListener);
barAlpha.setOnSeekBarChangeListener(myOnSeekBarChangeListener);
//default color
int defaultColor = barAlpha.getProgress() * 0x1000000
+ barR.getProgress() * 0x10000
+ barG.getProgress() * 0x100
+ barB.getProgress();
image1.setColorFilter(defaultColor, Mode.MULTIPLY);
}
OnSeekBarChangeListener myOnSeekBarChangeListener = new OnSeekBarChangeListener(){
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
//Colorize ImageView
int newColor = barAlpha.getProgress() * 0x1000000
+ barR.getProgress() * 0x10000
+ barG.getProgress() * 0x100
+ barB.getProgress();
image1.setColorFilter(newColor, Mode.MULTIPLY);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {}
};
}
<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"
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.androidimageview.MainActivity" >
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:autoLink="web"
android:text="http://android-er.blogspot.com/"
android:textStyle="bold" />
<SeekBar
android:id="@+id/r"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="255"
android:progress="255" />
<SeekBar
android:id="@+id/g"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="255"
android:progress="255" />
<SeekBar
android:id="@+id/b"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="255"
android:progress="255" />
<SeekBar
android:id="@+id/alpha"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:max="255"
android:progress="255" />
<ImageView
android:id="@+id/image1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/ic_launcher" />
</LinearLayout>
Next:
- Various effect of PorterDuff.Mode when using setColorFilter() on ImageView
No comments:
Post a Comment