#ANDROID - Fotoğraf Çekmek ve Wallpaper Olarak Atamak

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_gravity="center"
        android:src="@drawable/ic_launcher"
        android:id="@+id/ivCekilenResim"/>

    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:src="@drawable/ic_launcher"
        android:id="@+id/ibResimCek"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:text="Duvar Kağıdı Yap"
        android:id="@+id/bDuvarKagidiYap"/>

</LinearLayout>

package com.hakancengiz.blogders;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;

import java.io.IOException;
import java.io.InputStream;

public class ResimCek extends Activity implements View.OnClickListener {

    ImageView cekilenResim;
    ImageButton resimCekenButon;
    Button duvarKagidiYapButonu;
    Intent i;
    final static int kamera=0;
    Bitmap bmp;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.kamera);
        ilkleme();
    }

    private void ilkleme() {
        cekilenResim = (ImageView) findViewById(R.id.ivCekilenResim);
        resimCekenButon = (ImageButton) findViewById(R.id.ibResimCek);
        duvarKagidiYapButonu = (Button) findViewById(R.id.bDuvarKagidiYap);
        resimCekenButon.setOnClickListener(this);
        duvarKagidiYapButonu.setOnClickListener(this);

        //Ekran yan döndüğünde resim gitmesin diye
        InputStream is = getResources().openRawResource(R.drawable.ic_launcher);
        bmp = BitmapFactory.decodeStream(is);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId())
        {
            case R.id.bDuvarKagidiYap:

                try {
                    getApplicationContext().setWallpaper(bmp);
                } catch (IOException e) {
                    e.printStackTrace();
                }

                break;

            case  R.id.ibResimCek:

                i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(i, kamera);

                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(resultCode==RESULT_OK)
        {
            Bundle bohca = data.getExtras();
            bmp = (Bitmap) bohca.get("data");
            cekilenResim.setImageBitmap(bmp);
        }
    }
}

<uses-permission android:name="android.permission.SET_WALLPAPER" />