拍照并且剪切

package com.example.nineteen;

import java.io.File;

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.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

/**
* @author HD
* @date 2015-12-7
* @package_name com.example.nineteen
* @file_name MainActivity.java
*/
public class MainActivity extends Activity implements OnClickListener {

private Button btnTakePhone;

private Button btnReceiveAlbum;

private ImageView ivImage;

private Uri pictureUri;

public static final int TAKE_PHONE = 0;

public static final int CROP_PHONE = 1;

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

btnTakePhone = (Button) findViewById(R.id.btnTakePhone);
ivImage = (ImageView) findViewById(R.id.ivImage);
btnReceiveAlbum = (Button) findViewById(R.id.btnReceiveAlbum);
btnTakePhone.setOnClickListener(this);
btnReceiveAlbum.setOnClickListener(this);
}

@Override
public void onClick(View v) {
// TODO 自动生成的方法存根
File file = new File(Environment.getExternalStorageDirectory(),
"myFirstPicture.jpg");
try {
if(file.exists()){
file.delete();
}
file.createNewFile();
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
pictureUri = Uri.fromFile(file);
switch (v.getId()) {
case R.id.btnTakePhone:
Intent intent = new Intent();
// 包名+action.描述
intent.setAction("android.media.action.IMAGE_CAPTURE");
// 指定的拍照之后文件的输出路径
intent.putExtra(MediaStore.EXTRA_OUTPUT, pictureUri);
startActivityForResult(intent, TAKE_PHONE);
break;

default:
break;
}
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO 自动生成的方法存根
switch (requestCode) {
case TAKE_PHONE:
if (resultCode == RESULT_OK) {
Toast.makeText(MainActivity.this, "拍照成功", Toast.LENGTH_SHORT)
.show();
Intent intent = new Intent();
intent.setAction("com.android.camera.action.CROP");
// 设置对应文件的MIME类型,用来打开文件时的标识
intent.setDataAndType(pictureUri, "image/*");
// 告知需要对文件进行剪切
intent.putExtra("scale", true);
startActivityForResult(intent, CROP_PHONE);
}
break;

case CROP_PHONE:
Log.i("hhhd", "crop phone");
if (resultCode == Activity.RESULT_OK) {
try {
//                  通过内容提供者打开一个文件输入流，然后进行解码成Bitmap对象
Bitmap bitmap = BitmapFactory
.decodeStream(getContentResolver().openInputStream(
pictureUri));
ivImage.setImageBitmap(bitmap);
} catch (Exception e) {
// TODO: handle exception
}
}
break;

default:
break;
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.nineteen"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

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

</manifest>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.nineteen.MainActivity" >

<Button
android:id="@+id/btnTakePhone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:text="拍照"/>

<ImageView
android:id="@+id/ivImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"/>

<Button
android:id="@+id/btnReceiveAlbum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/btnTakePhone"
android:layout_alignBottom="@+id/btnTakePhone"
android:layout_marginLeft="22dp"
android:layout_toRightOf="@+id/btnTakePhone"
android:text="获取相册相片" />

</RelativeLayout>