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Wednesday, July 14, 2010

Load bitmap file from SD Card

In last exercise "Save file to SD Card", a file have been saved in SD Card. In this exercise, the bitmap file in SD Card will be loaded, using BitmapFactory.

Load bitmap file from SD Card

main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<ImageView
android:id="@+id/imageview"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="center"
/>
</LinearLayout>


AndroidBitmap.java
package com.exercise.AndroidBitmap;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.ImageView;

public class AndroidBitmap extends Activity {

private final String imageInSD = "/sdcard/er.PNG";

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

Bitmap bitmap = BitmapFactory.decodeFile(imageInSD);
ImageView myImageView = (ImageView)findViewById(R.id.imageview);
myImageView.setImageBitmap(bitmap);

}
}


Download the files.

next: Scale bitmap image, using Matrix

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