Android image converter code sharing
- 2020-04-01 04:19:09
- OfStack
MainActivity. Java
package com.zhang.showPhoto;
import android.app.ActionBar.LayoutParams;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;
public class MainActivity extends Activity {
private int[] imagId=new int[]{
R.drawable.img01,R.drawable.img02,R.drawable.img03,R.drawable.img04,
R.drawable.img05,R.drawable.img06,R.drawable.img07,R.drawable.img08,
R.drawable.img09,R.drawable.img10
};
private int index=0;
private ImageSwitcher imageSwitcher;
private Button up,down;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
up=(Button) findViewById(R.id.bt1);
down=(Button) findViewById(R.id.bt2);
imageSwitcher=(ImageSwitcher) findViewById(R.id.imagSw1);
imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));
imageSwitcher.setFactory(new ViewFactory() {
public View makeView() {
ImageView imageView = new ImageView(MainActivity.this);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT
));
return imageView;
}
});
imageSwitcher.setImageResource(imagId[index]);
up.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(index>0){
index--;
}else{
index=imagId.length-1;
}
imageSwitcher.setImageResource(imagId[index]);
}
});
down.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(index<imagId.length-1){
index++;
}else{
index=0;
}
imageSwitcher.setImageResource(imagId[index]);
}
});
}
}
XML main.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:background="@drawable/bg1"
android:id="@+id/llayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="horizontal" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" On one piece "
android:id="@+id/bt1"
/>
<ImageSwitcher
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imagSw1"
android:layout_gravity="center"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" The next "
android:id="@+id/bt2"
/>
</LinearLayout>
Let's do another piece of code
//Gets the width and height of the image
BitmapFactory.Options opt = new BitmapFactory.Options();
opt.inJustDecodeBounds = true;
try{
bitmapIn = BitmapFactory.decodeFile(Puzzle.user.CUSTOM_IMAGE[customImage], opt);
}catch(Exception e){
if(D) Log.d(TAG,"error");
return;
}
int in_w=opt.outWidth,in_h=opt.outHeight;
//Get the size of the imageview be careful that the aspect ratio of the imageview should be the same as the original image otherwise you need to calculate it separately
full_w = imageview.getWidth()
full_h = getHeight()
//Calculate the scale with rounding
int Size_rate=(in_w*in_h*10)/(full_w*full_h);
if(Size_rate>10){
Size_rate+=5;
Size_rate/=10;
}else{
Size_rate=1;
}
//Reset opt to read the image file
opt.inSampleSize=Size_rate;
opt.inJustDecodeBounds = false;
opt.inScaled = false;
opt.outWidth=full_w;
opt.outHeight=full_h;
bitmapIn = BitmapFactory.decodeFile(Puzzle.user.CUSTOM_IMAGE[customImage], opt);}