Jan 4, 2011

How to pass bitmap between activities

A bitmap created from R.drawable.icon will be passed from one activity (AndroidPassingBitmap) to another activity (AndroidReceiveBitmap).

How to passing bitmap between activities

Modify the activity AndroidPassingBitmap.java, simple create a bitmap and pass to the second activity.
/AndroidPassingBitmap/src/com/AndroidPassingBitmap/AndroidPassingBitmap.java
package com.AndroidPassingBitmap;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;

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

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);

Intent intent = new Intent();
intent.setClass(AndroidPassingBitmap.this, AndroidReceiveBitmap.class);
intent.putExtra("Bitmap", bitmap);
startActivity(intent);

}
}


Create a new activity to retrieve and display the bitmap.
/workspace/AndroidPassingBitmap/src/com/AndroidPassingBitmap/AndroidReceiveBitmap.java
package com.AndroidPassingBitmap;

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

public class AndroidReceiveBitmap extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);

Bitmap bitmap = (Bitmap)this.getIntent().getParcelableExtra("Bitmap");

setContentView(R.layout.newimage);
ImageView viewBitmap = (ImageView)findViewById(R.id.bitmapview);

viewBitmap.setImageBitmap(bitmap);

}

}


Create the layout of the second activity.
/workspace/AndroidPassingBitmap/res/layout/newimage.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"
>
<ImageView
android:id="@+id/bitmapview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>


Update AndroidManifest.xml to include the second activity in the package.
/workspace/AndroidPassingBitmap/AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.AndroidPassingBitmap"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".AndroidPassingBitmap"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".AndroidReceiveBitmap"
android:label="AndroidReceiveBitmap">
</activity>
</application>
<uses-sdk android:minSdkVersion="4" />

</manifest>




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