拍照并且剪切

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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>

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