从相册或拍照获取图片，并实现图片的裁剪

其他 2018-10-10 23:57:47 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/ToOak_And/article/details/51445921

MainActivity：

package com.example.xushuailong.mydopicture;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.xushuailong.mydopicture.utils.Utilty;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class MainActivity extends FragmentActivity implements View.OnClickListener {

    private static final int REQUEST_CODE_PICK_IMAGE = 0;
    private static final int REQUEST_CODE_CAPTURE_CAMERA = 1;
    private static final int REQUEST_CODE_REL_CAPTURE_CAMERA = 2;
    private static final int REQUEST_CODE_CROP_CAPTURE_CAMERA = 3;
//    private static final int REQUEST_CODE_CROP_PICK_IMAGE = 3;
    private Button btn_get_from_album, btn_get_from_camera, btn_get_rel_from_camera, btn_get_crop_from_camera, btn_get_crop_from_album;
    private String ima_path;
    private TextView txt_img_path;
    private ImageView img;
    private String rel_ima_path;

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE_PICK_IMAGE){
            //相册
            if (null != data) {
                Uri uri = data.getData();
                Log.d("xsl", "image_uri:" + uri);
                String img_path = Utilty.getPathFromKitKat(getApplicationContext(), uri);
                todoImageWithPatn(img_path);
            }
        }else if (requestCode == REQUEST_CODE_CAPTURE_CAMERA) {
            //相机
            if (null != data) {
                Uri uri = data.getData();
                Log.d("xsl", "camera_uri:" + uri);
                if (uri == null) {
                    Bundle bundle = data.getExtras();
                    if (bundle != null) {
                        Bitmap photo = (Bitmap) bundle.get("data");
                        saveImage(photo, ima_path);
                    } else {
                        Toast.makeText(getApplicationContext(), "error", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    //TODO do find the path of pic by uri
                }
            }
        }else if (requestCode == REQUEST_CODE_REL_CAPTURE_CAMERA){
            if (null != data){
                Log.d("xsl", "data_extra: " + data.getExtras());
            }else {
                Log.d("xsl", "data is null !");
            }
            todoImageWithPatn(rel_ima_path);
        }else if (requestCode == REQUEST_CODE_CROP_CAPTURE_CAMERA) {
            Intent intent = new Intent("com.android.camera.action.CROP");
            intent.setDataAndType(Uri.fromFile(new File(rel_ima_path)), "image/*");
            intent.putExtra("scale", true);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(rel_ima_path)));
            startActivityForResult(intent, REQUEST_CODE_REL_CAPTURE_CAMERA);
        }
    }

    private void todoImageWithPatn(String ima_path) {
        txt_img_path.setText("path: " + ima_path);
//        img.setImageDrawable(Drawable.createFromPath(ima_path));
        try {
            img.setImageDrawable(Drawable.createFromStream(new FileInputStream(ima_path),System.currentTimeMillis()+"ss.jpg"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void saveImage(Bitmap photo, String ima_path) {
//        img.setImageBitmap(photo);
        File file = new File(ima_path);
        if (!file.exists()){
            file.mkdirs();
        }
        BufferedOutputStream out = null;
        try {
            file = new File(ima_path + File.separator + System.currentTimeMillis() +".jpg");
            file.createNewFile();
            out = new BufferedOutputStream(new FileOutputStream(file.getPath(),false));
            Log.d("xsl","image_path: "+file.getPath());
            photo.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            todoImageWithPatn(file.getPath());
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if (null != out){
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

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

    private void initViews() {
        btn_get_crop_from_album = (Button) findViewById(R.id.btn_get_crop_from_album);
        btn_get_crop_from_camera = (Button) findViewById(R.id.btn_get_crop_from_camera);
        btn_get_from_album = (Button) findViewById(R.id.btn_get_from_album);
        btn_get_from_camera = (Button) findViewById(R.id.btn_get_from_camera);
        btn_get_rel_from_camera = (Button) findViewById(R.id.btn_get_rel_from_camera);
        txt_img_path = (TextView) findViewById(R.id.txt_img_path);
        img = (ImageView) findViewById(R.id.img);
    }

    private void viewEvents() {
        btn_get_crop_from_album.setOnClickListener(this);
        btn_get_crop_from_camera.setOnClickListener(this);
        btn_get_from_album.setOnClickListener(this);
        btn_get_from_camera.setOnClickListener(this);
        btn_get_rel_from_camera.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn_get_from_album:{
                getImageFromAlbum();
                break;
            }
            case R.id.btn_get_from_camera:{
                getImageFromCamera();
                break;
            }
            case R.id.btn_get_rel_from_camera:{
                getRelImageFromCamera();
                break;
            }
            case R.id.btn_get_crop_from_camera:{
                getCropImageFromCamera();
                break;
            }
            case R.id.btn_get_crop_from_album:{
                getCropImageFromAlbum();
                break;
            }
        }
    }

    public void getImageFromAlbum() {
        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setType("image/*");//相片类型
        startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);
    }

    public void getImageFromCamera() {
        String state = Environment.getExternalStorageState();
        if (state.equals(Environment.MEDIA_MOUNTED)){
            ima_path = Environment.getExternalStorageDirectory().getPath() + "/imge_temp/";
            Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
            startActivityForResult(intent,REQUEST_CODE_CAPTURE_CAMERA);
        }else {
            Toast.makeText(getApplicationContext(),"请确认已插入SD卡",Toast.LENGTH_SHORT).show();
        }
    }

    public void getRelImageFromCamera(){
        String state = Environment.getExternalStorageState();
        if (state.equals(Environment.MEDIA_MOUNTED)){
            Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
            String out_file_path = Environment.getExternalStorageDirectory().getPath() + "/imge_temp/rel_image";
            File dir = new File(out_file_path);
            if (!dir.exists()){
                dir.mkdirs();
            }
            rel_ima_path = out_file_path + File.separator + System.currentTimeMillis() + ".jpg";
            intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(rel_ima_path)));
            intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
            startActivityForResult(intent, REQUEST_CODE_REL_CAPTURE_CAMERA);
        }
    }


    public void getCropImageFromCamera() {
        String out_img_path = Environment.getExternalStorageDirectory().getPath() + "/imge_temp/crop_image";
        File dir = new File(out_img_path);
        if (!dir.exists()){
            dir.mkdirs();
        }
        rel_ima_path = out_img_path + File.separator + System.currentTimeMillis() + ".jpg";
        Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
        intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(new File(rel_ima_path)));
        startActivityForResult(intent,REQUEST_CODE_CROP_CAPTURE_CAMERA);
    }

    public void getCropImageFromAlbum() {
        String out_img_path = Environment.getExternalStorageDirectory().getPath() + "/imge_temp/crop_chose";
        File dir = new File(out_img_path);
        if (!dir.exists()){
            dir.mkdirs();
        }
        rel_ima_path = out_img_path + File.separator + System.currentTimeMillis() + ".jpg";
//        Intent intent = new Intent("android.intent.action.GET_CONTENT");
        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setType("image/*");
        intent.putExtra("crop", true);
//        intent.putExtra("scale", true);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(new File(rel_ima_path)));
        startActivityForResult(intent,REQUEST_CODE_REL_CAPTURE_CAMERA);
    }
}


utils：

package com.example.xushuailong.mydopicture.utils;

import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;


@TargetApi(Build.VERSION_CODES.KITKAT)
public class Utilty {

	/**
	 * 在android4.4上获取资源的路径
	 * 
	 * @param context
	 * @param uri
	 * @return
	 */
	public static String getPathFromKitKat(final Context context, final Uri uri) {

		final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

		// DocumentProvider
		if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
			// ExternalStorageProvider
			if (isExternalStorageDocument(uri)) {
				final String docId = DocumentsContract.getDocumentId(uri);
				final String[] split = docId.split(":");
				final String type = split[0];

				if ("primary".equalsIgnoreCase(type)) {
					return Environment.getExternalStorageDirectory() + "/"
							+ split[1];
				}

				// TODO handle non-primary volumes
			}
			// DownloadsProvider
			else if (isDownloadsDocument(uri)) {

				final String id = DocumentsContract.getDocumentId(uri);
				final Uri contentUri = ContentUris.withAppendedId(
						Uri.parse("content://downloads/public_downloads"),
						Long.valueOf(id));

				return getDataColumn(context, contentUri, null, null);
			}
			// MediaProvider
			else if (isMediaDocument(uri)) {
				final String docId = DocumentsContract.getDocumentId(uri);
				final String[] split = docId.split(":");
				final String type = split[0];

				Uri contentUri = null;
				if ("image".equals(type)) {
					contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
				} else if ("video".equals(type)) {
					contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
				} else if ("audio".equals(type)) {
					contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
				}

				final String selection = "_id=?";
				final String[] selectionArgs = new String[] { split[1] };

				return getDataColumn(context, contentUri, selection,
						selectionArgs);
			}
		}
		// MediaStore (and general)
		else if ("content".equalsIgnoreCase(uri.getScheme())) {

			// Return the remote address
			if (isGooglePhotosUri(uri))
				return uri.getLastPathSegment();

			return getDataColumn(context, uri, null, null);
		}
		// File
		else if ("file".equalsIgnoreCase(uri.getScheme())) {
			return uri.getPath();
		}

		return null;
	}

	public static String getDataColumn(Context context, Uri uri,
			String selection, String[] selectionArgs) {

		Cursor cursor = null;
		final String column = "_data";
		final String[] projection = { column };

		try {
			cursor = context.getContentResolver().query(uri, projection,
					selection, selectionArgs, null);
			if (cursor != null && cursor.moveToFirst()) {
				final int index = cursor.getColumnIndexOrThrow(column);
				return cursor.getString(index);
			}
		} finally {
			if (cursor != null)
				cursor.close();
		}
		return null;
	}

	public static boolean isExternalStorageDocument(Uri uri) {
		return "com.android.externalstorage.documents".equals(uri
				.getAuthority());
	}

	public static boolean isDownloadsDocument(Uri uri) {
		return "com.android.providers.downloads.documents".equals(uri
				.getAuthority());
	}

	public static boolean isMediaDocument(Uri uri) {
		return "com.android.providers.media.documents".equals(uri
				.getAuthority());
	}

	public static boolean isGooglePhotosUri(Uri uri) {
		return "com.google.android.apps.photos.content".equals(uri
				.getAuthority());
	}


}

activity_layout:: 

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context="com.example.xushuailong.mydopicture.MainActivity">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <Button
            android:id="@+id/btn_get_from_album"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="get pic from album"/>
        <Button
            android:id="@+id/btn_get_crop_from_album"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="get crop pic from album"/>
        <Button
            android:id="@+id/btn_get_from_camera"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="get pic from camera"/>
         <Button
            android:id="@+id/btn_get_rel_from_camera"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="get rel pic from camera"/>
       <Button
            android:id="@+id/btn_get_crop_from_camera"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="get crop pic from camera"/>
        <TextView
            android:text="img_path: "
            android:maxLines="2"
            android:id="@+id/txt_img_path"
            android:layout_width="match_parent"
            android:layout_height="48dp" />
        <ImageView
            android:src="@mipmap/ic_launcher"
            android:id="@+id/img"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:scaleType="fitCenter"/>
    </LinearLayout>

</RelativeLayout>

这部分程序功能的bug是，当从相册选择的图片或拍照的图片太大的时候，ImageView就显示不出来图片，有待于进一步的优化。。。。

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