Android 实现调用系统拍照相册，剪切功能

1.XML布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    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.administrator.myapplication.MainActivity">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="hello" />

    <ImageView
        android:id="@+id/imageID"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true"
        android:maxHeight="50dip"
        android:maxWidth="50dip" />

    <Button
        android:id="@+id/btn_01"
        android:layout_width="150dip"
        android:layout_height="50dip"
        android:text="相册" />

    <Button
        android:id="@+id/btn_02"
        android:layout_width="150dip"
        android:layout_height="50dip"
        android:text="拍照" />
</LinearLayout>

2.Activity

 package com.example.administrator.myapplication;

 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Environment;
 import android.provider.MediaStore;
 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.ByteArrayOutputStream;
 import java.io.File;

 public class MainActivity extends AppCompatActivity {

     public static final int NONE = 0;
     public static final int PHOTOHRAPH = 1;// 拍照
     public static final int PHOTOZOOM = 2; // 缩放
     public static final int PHOTORESOULT = 3;// 结果

     public static final String IMAGE_UNSPECIFIED = "image/*";
     ImageView imageView = null;
     Button button0 = null;
     Button button1 = null;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         imageView = (ImageView) findViewById(R.id.imageID);
         button0 = (Button) findViewById(R.id.btn_01);
         button1 = (Button) findViewById(R.id.btn_02);

         button0.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(Intent.ACTION_PICK, null);
                 intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
                 startActivityForResult(intent, PHOTOZOOM);
             }
         });

         button1.setOnClickListener(new View.OnClickListener() {

             @Override
             public void onClick(View v) {
                 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                 intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));
                 startActivityForResult(intent, PHOTOHRAPH);
             }
         });
     }

     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (resultCode == NONE)
             return;
         // 拍照
         if (requestCode == PHOTOHRAPH) {
             //设置文件保存路径这里放在跟目录下
             File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
             startPhotoZoom(Uri.fromFile(picture));
         }

         if (data == null)
             return;

         // 读取相册缩放图片
         if (requestCode == PHOTOZOOM) {
             startPhotoZoom(data.getData());
         }
         // 处理结果
         if (requestCode == PHOTORESOULT) {
             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)压缩文件
                 imageView.setImageBitmap(photo);
             }

         }

         super.onActivityResult(requestCode, resultCode, data);
     }

     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 是宽高的比例
         intent.putExtra("aspectX", 1);
         intent.putExtra("aspectY", 1);
         // outputX outputY 是裁剪图片宽高
         intent.putExtra("outputX", 64);
         intent.putExtra("outputY", 64);
         intent.putExtra("return-data", true);
         startActivityForResult(intent, PHOTORESOULT);
     }
 }

--------------------------

package com.example.administrator.myapplicationphotochange;

import android.content.ContentResolver;
import android.content.Intent;
import android.content.SyncStatusObserver;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.io.ByteArrayOutputStream;
import java.io.File;

public class MainActivity extends AppCompatActivity {
    public static final int NONE = 0;
    public static final int PHOTOHRAPH = 1;// 拍照
    public static final int PHOTOZOOM = 2; // 缩放
    public static final int PHOTORESOULT = 3;// 结果

    public static final String IMAGE_UNSPECIFIED = "image/*";
    ImageView imageView = null;
    Button button0 = null;
    Button button1 = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView) findViewById(R.id.imageID);
        button0 = (Button) findViewById(R.id.btn_01);
        button1 = (Button) findViewById(R.id.btn_02);

        button0.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_PICK, null);
                intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
                startActivityForResult(intent, PHOTOZOOM);
            }
        });

        button1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg")));
                startActivityForResult(intent, PHOTOHRAPH);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == NONE)
            return;
        // 拍照
        if (requestCode == PHOTOHRAPH) {
            //设置文件保存路径这里放在跟目录下
            File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
            startPhotoZoom(Uri.fromFile(picture));
        }

        if (data == null)
            return;

        // 读取相册缩放图片
        if (requestCode == PHOTOZOOM) {
            startPhotoZoom(data.getData());
            ContentResolver resolver = getContentResolver();
            Uri originalUri = data.getData();        //获得图片的uri
            // Bitmap bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);
            String[] proj = {MediaStore.Images.Media.DATA};
            Cursor cursor = managedQuery(originalUri, proj, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            String path = cursor.getString(column_index);
            String path1=Environment.getExternalStorageDirectory().getAbsolutePath();
            Log.d("path**1",path1);
            Log.d("path**",path);
        }
        // 处理结果
        if (requestCode == PHOTORESOULT) {
            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)压缩文件
                imageView.setImageBitmap(photo);
            }

        }

        super.onActivityResult(requestCode, resultCode, data);
    }

    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 是宽高的比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // outputX outputY 是裁剪图片宽高
        intent.putExtra("outputX", 64);
        intent.putExtra("outputY", 64);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, PHOTORESOULT);
    }
}