Android calls the phone's camera method

This article gives an example of how Android calls the phone's camera function. Share to everybody for everybody reference. The details are as follows:

1. main. xml layout file:

<?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/imageView"
  android:adjustViewBounds="true"
  android:layout_gravity="center"
  android:minWidth="150dip"
  android:minHeight="150dip"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>
 <Button android:id="@+id/btnPhone"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text=" Photo album " />
 <Button android:id="@+id/btnTakePicture"
  android:layout_height="wrap_content"
  android:layout_width="fill_parent"
  android:text=" Taking pictures " />
</LinearLayout>

2. Core code:

package com.ljq.test;
import java.io.ByteArrayOutputStream;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class TestActivity extends Activity {
 private static final int NONE = 0;
 private static final int PHOTO_GRAPH = 1;//  Taking pictures 
 private static final int PHOTO_ZOOM = 2; //  The zoom 
 private static final int PHOTO_RESOULT = 3;//  The results of 
 private static final String IMAGE_UNSPECIFIED = "image/*";
 private ImageView imageView = null;
 private Button btnPhone = null;
 private Button btnTakePicture = null;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  imageView = (ImageView) findViewById(R.id.imageView);
  btnPhone = (Button) findViewById(R.id.btnPhone);
  btnPhone.setOnClickListener(onClickListener);
  btnTakePicture = (Button) findViewById(R.id.btnTakePicture);
  btnTakePicture.setOnClickListener(onClickListener);
 }
 private final View.OnClickListener onClickListener = new View.OnClickListener() {
  @Override
  public void onClick(View v) {
   if(v==btnPhone){ // Get an image from an album 
    Intent intent = new Intent(Intent.ACTION_PICK, null);
    intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
    startActivityForResult(intent, PHOTO_ZOOM);
   }else if(v==btnTakePicture){ // Get an image from a photo 
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment
     .getExternalStorageDirectory(),"temp.jpg")));
    startActivityForResult(intent, PHOTO_GRAPH);
   }
  }
 };
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (resultCode == NONE)
   return;
  //  Taking pictures 
  if (requestCode == PHOTO_GRAPH) {
   //  Set the file save path 
   File picture = new File(Environment.getExternalStorageDirectory()
     + "/temp.jpg");
   startPhotoZoom(Uri.fromFile(picture));
  }
  if (data == null)
   return;
  //  Read albums to zoom in and out pictures 
  if (requestCode == PHOTO_ZOOM) {
   startPhotoZoom(data.getData());
  }
  //  The processing results 
  if (requestCode == PHOTO_RESOULT) {
   Bundle extras = data.getExtras();
   if (extras != null) {
    Bitmap photo = extras.getParcelable("data");
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0-100) The compressed file 
    // Here we can put Bitmap Save to sd In the card 
    imageView.setImageBitmap(photo); // Show the picture in ImageView Controls on 
   }
  }
  super.onActivityResult(requestCode, resultCode, data);
 }
 /**
  *  images 
  * 
  * @param uri
  */
 public void startPhotoZoom(Uri uri) {
  Intent intent = new Intent("com.android.camera.action.CROP");
  intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
  intent.putExtra("crop", "true");
  // aspectX aspectY  It's the ratio of width to height 
  intent.putExtra("aspectX", 1);
  intent.putExtra("aspectY", 1);
  // outputX outputY  Is cropped image width and height 
  intent.putExtra("outputX", 300);
  intent.putExtra("outputY", 500);
  intent.putExtra("return-data", true);
  startActivityForResult(intent, PHOTO_RESOULT);
 }
}

Hopefully, this article has helped you with your Android programming.