I want to set an image saved on sd card in main layout background through my application

Question

i am creating an application in which i want set different background images in main xml linearlayout.I have stored 5 image files on sd card .now i want to select a pic and

Answer 1

First assign an id to the main xml linearlayout, for example in the following case it is named" container"

Then in the .java code you can find the layout object and set a drawable as its background:

package org.example.app;

import android.app.Activity;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

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

        String pathName = "/sdcard/gif001.gif";
        Resources res = getResources();
        Bitmap bitmap = BitmapFactory.decodeFile(pathName);
        BitmapDrawable bd = new BitmapDrawable(res, bitmap);
        View view = findViewById(R.id.container);
        view.setBackgroundDrawable(bd);
    }
}

Regards

Ziteng Chen