android 7.0以上获取图片工具类

由于android版本升级，对权限要求越来越多，针对这个问题而产生一个工具类来处理这个问题。

首先需要在AndroidManifest.xml 中添加权限,和7.0以上系统的文件获取权限

<?xml version="1.0" encoding="utf-8"?>xmlns:android="http://schemas.android.com/apk/res/android"    package="com.cxl.demo">    android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    android:name="android.permission.READ_EXTERNAL_STORAGE" />    android:name="android.permission.CAMERA" />                android:name=".global.MyApp"        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:theme="@style/AppTheme">                    android:name="android.support.v4.content.FileProvider"            android:authorities="com.ftoul.androidclient.fileProvider"            android:exported="false"            android:grantUriPermissions="true">                            android:name="android.support.FILE_PROVIDER_PATHS"                android:resource="@xml/file_paths" />

然后还需要在res目录下添加一个我xml的文件夹。并添加一个file_paths.xml的文件

文件内容如下：

<?xml version="1.0" encoding="utf-8"?>    path="Android/data/com/ftoul/androidclient/" name="files_root" />    path="." name="external_storage_root" />

然后工具类具体的源代码如下
源代码如下：

import android.Manifest;import android.app.Activity;import android.content.ContentResolver;import android.content.Intent;import android.content.pm.PackageManager;import android.database.Cursor;import android.net.Uri;import android.os.Build;import android.os.Environment;import android.provider.MediaStore;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v4.content.FileProvider;import java.io.File;import static android.app.Activity.RESULT_OK;/** * Created by ftoul106 on 2018/1/19 0019. */public class GetImgUtil {    private OnGetImgSuccess onGetImgSuccess;    private String mCameraFilePath;    private static final int CARMER = 1002;    private static final int IMG_FILE = 1003;    private static final int FILE_REQUEST = 10001;    private static final int CARMER_REQUEST = 10002;    private Activity context;    public GetImgUtil(Activity context) {        this.context = context;    }    public interface OnGetImgSuccess {        void onSuccess(String mCameraFilePath);    }    public void setOnGetImgSuccess(OnGetImgSuccess onGetImgSuccess) {        this.onGetImgSuccess = onGetImgSuccess;    }    public void onActivityResult(int requestCode, int resultCode, Intent data) {        if (resultCode == RESULT_OK) {            switch (requestCode) {                case CARMER://相机                    onGetImgSuccess.onSuccess(mCameraFilePath);                    break;                case IMG_FILE://图片选择                    Uri uri = data.getData();                    android.util.Log.e("imgPath", uri.getPath());                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {//4.4以上                        /**根据Uri获取图片的路径，包含文件名和扩展名*/                        String[] proj = {MediaStore.Images.Media.DATA};                        ContentResolver cr = context.getContentResolver();                        Cursor cursor = cr.query(uri, proj, null, null, null);                        if (cursor == null) {//部分4.4机型问题                            mCameraFilePath = data.getData().getPath();                        } else {                            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);                            cursor.moveToFirst();                            //最后根据索引值获取图片路径                            mCameraFilePath = cursor.getString(column_index);                            cursor.close();                        }                        android.util.Log.e("imgPath", mCameraFilePath);                    } else {//4.4，即4.4以下获取路径的方法                        mCameraFilePath = data.getData().getPath();                        android.util.Log.e("imgPath4.4以下", mCameraFilePath);                    }                    onGetImgSuccess.onSuccess(mCameraFilePath);                    break;                default:                    break;            }        }    }    /**     * 6.0 手机系统以上 检查并请求权限     *相机选择     * @param context 必须为 Activity     */    public void openCamera() {        int i = ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA);        int y = ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE);        if (i != PackageManager.PERMISSION_GRANTED && y != PackageManager.PERMISSION_GRANTED) {//            ActivityCompat.requestPermissions(context,                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, CARMER_REQUEST);        } else if (i != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(context, new String[]{Manifest.permission.CAMERA}, CARMER_REQUEST);        } else if (y != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(context, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, CARMER_REQUEST);        } else {            doNext();        }    }    /**     * 6.0 手机系统以上 检查并请求权限     * 文件选择     * @param context 必须为 Activity     */    public void openFileChoice() {        int y = ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE);        if (y != PackageManager.PERMISSION_GRANTED) {            ActivityCompat.requestPermissions(context,                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, FILE_REQUEST            );        } else {            doFileNext();        }    }    /**     * 创建调用照相机的intent     *     * @return     */    private void doNext() {        Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        File externalDataDir = Environment                .getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);        System.out.println("externalDataDir:" + externalDataDir);        File cameraDataDir = new File(externalDataDir.getAbsolutePath()                + File.separator + "browser-photo");        cameraDataDir.mkdirs();        mCameraFilePath = cameraDataDir.getAbsolutePath() + File.separator                + System.currentTimeMillis() + ".jpg";        //判断是否是AndroidN以及更高的版本        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {            Uri contentUri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".fileProvider", new File(mCameraFilePath));            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, contentUri);        } else {            cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,                    Uri.fromFile(new File(mCameraFilePath)));        }        context.startActivityForResult(Intent.createChooser(cameraIntent, "相机选择"), CARMER);    }    private void doFileNext() {        Intent i = createFileItent();        context.startActivityForResult(Intent.createChooser(i, "图片选择"), IMG_FILE);    }    /**     * 创建选择图库的intent     *     * @return     */    private Intent createFileItent() {        Intent i = new Intent(Intent.ACTION_GET_CONTENT);        i.addCategory(Intent.CATEGORY_OPENABLE);        i.setType("image/*");        Intent intent = new Intent(                Intent.ACTION_PICK,                MediaStore.Images.Media.EXTERNAL_CONTENT_URI);        intent.setDataAndType(                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                "image/*");        return intent;    }    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        if (requestCode == CARMER_REQUEST) {//申请相机权限回调结果            for (int i = 0; i < grantResults.length; i++) {                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {                    MyToast.show("请打开拍照和读取本地文件权限");                    return;                }            }            doNext();        }        if (requestCode == FILE_REQUEST) {//文件选择回调            for (int i = 0; i < grantResults.length; i++) {                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {                    MyToast.show("请打开读取本地文件权限");                    return;                }            }            doFileNext();        }    }}

在activity中使用示例代码如下：

import android.content.Intent;import android.support.annotation.NonNull;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import com.ftoul.androidclient.R;import com.ftoul.androidclient.utils.GetImgUtil;public class Test2Activity extends AppCompatActivity {    private GetImgUtil getImgUtil;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_test2);        Button btnCamera = findViewById(R.id.btn_open_camera);        Button btnFile = findViewById(R.id.btn_open_file);        getImgUtil = new GetImgUtil(this);        btnCamera.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                getImgUtil.openCamera();//打开相机            }        });        btnFile.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                getImgUtil.openFileChoice();//打开文件选择            }        });        getImgUtil.setOnGetImgSuccess(new GetImgUtil.OnGetImgSuccess() {//添加获取文件监听            @Override            public void onSuccess(String mCameraFilePath) {//获取到的图片地址            }        });    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        if (getImgUtil != null) {            getImgUtil.onRequestPermissionsResult(requestCode, permissions, grantResults);        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (getImgUtil != null) {            getImgUtil.onActivityResult(requestCode, resultCode, data);        }    }}

以上

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