Android Multimedia - Using the Camera

package com.example.thinkpad.camera;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ImageWriter;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;


public class MainActivity extends AppCompatActivity {
public static final int TAKE_PHOTO=1;
    private ImageView picture;
    private Uri imageUri;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);
        setContentView(R.layout.activity_main);
        Button takePhoto =(Button) findViewById(R.id.take_photo);
        picture =(ImageView) findViewById(R.id.pictrue);
        takePhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Create a File object to store the pictures after taking pictures
                File outputImage =new File(getExternalCacheDir(),"output_image.jpg");
                try{
                    if(outputImage.exists()){
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                }catch (IOException e){
                    e.printStackTrace ();
                }
                if(Build.VERSION.SDK_INT>=24){
                    imageUri= FileProvider.getUriForFile(MainActivity.this,"com.example.cameraalbumtest.fileprovider",outputImage);
                }else{
                    imageUri = Uri.fromFile (outputImage);
                }
// start the camera program
                Intent intent=new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,TAKE_PHOTO);
            }
        });
    }
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
        switch(requestCode){
            case TAKE_PHOTO:
                if(resultCode==RESULT_OK){
                    try{
                        //display the captured photo
                        Bitmap bitmap= BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                    }catch (FileNotFoundException e){
                        e.printStackTrace ();
                    }
                }
            break;
            default:
                break;
        }
    }

}

<?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"
    >
<Button
    android:id="@+id/take_photo"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Take Photo"/>
<ImageView
    android:id="@+id/pictrue"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"/>

</LinearLayout>

Create a new xml under res, and create a new file_paths.xml under xml.

<?xml version="1.0" encoding="utf-8"?>
    <paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images" path=""/>
</paths>

AndroidManifest.xml file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.thinkpad.camera">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <provider
            android:authorities="com.example.cameraalbumtest.fileprovider"
            android:name="android.support.v4.content.FileProvider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths"/>
        </provider>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>