Android拍照得到全尺寸图片并进行压缩_Android

废话不多说了，直接给大家贴代码了，具体代码如下所示：

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									<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

									  android:layout_width="match_parent"

									  android:layout_height="match_parent"

									  android:orientation="vertical" >

									  <Button

									    android:id="@+id/take_photo"

									    android:layout_width="match_parent"

									    android:layout_height="wrap_content"

									    android:text="Take Photo" />

									  <Button

									    android:id="@+id/get_photo"

									    android:layout_width="match_parent"

									    android:layout_height="wrap_content"

									    android:text="get Photo" />

									  <ImageView

									    android:id="@+id/picture"

									    android:layout_width="300dp"

									    android:layout_height="300dp"

									    android:layout_gravity="center_horizontal" />

									</LinearLayout>

									package com.example.choosepictest;

									import java.io.File;

									import java.io.IOException;

									import java.text.SimpleDateFormat;

									import java.util.Date;

									import android.app.Activity;

									import android.content.Intent;

									import android.graphics.Bitmap;

									import android.graphics.BitmapFactory;

									import android.net.Uri;

									import android.os.Bundle;

									import android.os.Environment;

									import android.provider.MediaStore;

									import android.view.View;

									import android.view.View.OnClickListener;

									import android.widget.Button;

									import android.widget.ImageView;

									public class MainActivity extends Activity implements OnClickListener {

									  static final int REQUEST_IMAGE_CAPTURE = 1;

									  private Button takePhoto;

									  private Button getPhoto;

									  private ImageView picture;

									  private Uri imgUri;

									  @Override

									  protected void onCreate(Bundle savedInstanceState) {

									    super.onCreate(savedInstanceState);

									    setContentView(R.layout.activity_main);

									    takePhoto = (Button) findViewById(R.id.take_photo);

									    getPhoto = (Button) findViewById(R.id.get_photo);

									    picture = (ImageView) findViewById(R.id.picture);

									    takePhoto.setOnClickListener(this);

									    getPhoto.setOnClickListener(this);

									  }  

									  @Override

									  public void onClick(View v) {

									    switch (v.getId()) {

									    case R.id.take_photo:

									      dispatchTakePictureIntent();

									      break;

									    default:

									      break;

									    }

									  }

									  // 保存全尺寸照片

									  String mCurrentPhotoPath;

									  private void dispatchTakePictureIntent() {

									    File appDir = new File(Environment.getExternalStorageDirectory(),

									        "/etoury/picCache");

									    if (!appDir.exists()) {

									      appDir.mkdir();

									    }

									    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")

									        .format(new Date());

									    String fileName = timeStamp + ".jpg";

									    File outputImage = new File(appDir, fileName);

									    try {

									      if (outputImage.exists()) {

									        outputImage.delete();

									      }

									      outputImage.createNewFile();

									    } catch (IOException e) {

									      e.printStackTrace();

									    }

									    mCurrentPhotoPath = outputImage.getAbsolutePath();

									    imgUri = Uri.fromFile(outputImage);

									    // 意图 相机

									    Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");

									    intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);

									    // 如果有相机

									    if (intent.resolveActivity(getPackageManager()) != null) {

									      startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);

									    }

									  }

									  //解码缩放图片(Decode a Scaled Image)

									  private void setPic() {

									    // Get the dimensions of the View

									    int targetW = picture.getWidth();

									    int targetH = picture.getHeight();

									    // Get the dimensions of the bitmap

									    BitmapFactory.Options bmOptions = new BitmapFactory.Options();

									    // 该 值设为true那么将不返回实际的bitmap，也不给其分配内存空间这样就避免内存溢出了。但是允许我们查询图片的信息这其中就包括图片大小信息

									    bmOptions.inJustDecodeBounds = true;

									    BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);

									    int photoW = bmOptions.outWidth;

									    int photoH = bmOptions.outHeight;

									    // Determine how much to scale down the image

									    // Math.min求最小值

									    int scaleFactor = Math.min(photoW/targetW, photoH/targetH);

									    // Decode the image file into a Bitmap sized to fill the View

									    bmOptions.inJustDecodeBounds = false;

									    // 设置恰当的inSampleSize可以使BitmapFactory分配更少的空间以消除该错误

									    bmOptions.inSampleSize = scaleFactor;

									    // 如果inPurgeable设为True的话表示使用BitmapFactory创建的Bitmap,用于存储Pixel的内存空间在系统内存不足时可以被回收

									    bmOptions.inPurgeable = true;

									    Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);

									    picture.setImageBitmap(bitmap);

									  }

									  @Override

									  protected void onActivityResult(int requestCode, int resultCode, Intent data) {

									    if (resultCode == RESULT_OK) {

									      switch (requestCode) {

									      case REQUEST_IMAGE_CAPTURE:

									        setPic();

									        break;

									      default:

									        break;

									      }

									    }

									  }

									}