Android中 调用系统摄像机&&回调上传（AndroidX库）

Posted 2021-06-26 Adorable_Rocy

前言：关于Android调用系统摄像，在Android6版本之后需要引导添加系统权限，Android8版本后需要添加文件读取

1.避雷提醒

1. 在使用AndoridX库之后，support库会自动失效！
   
   AndroidX库中，v7库会自动失效，是源自于support失效！
   

解决方案：迁移库（耗时、费力、耗资源）

2. 配置引导添加权限（在Android6以后便有了）

    private final int CODE_REQUEST_ALL_PERMISSIONS = 0x10;
    static final int RequestCode=1;
    private final String[] requestPermissions = {
            Manifest.permission.RECORD_AUDIO,
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE
    };

   private void applyAllNeedPermissions() {
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            // 一次性申请需要的所有权限
            ActivityCompat.requestPermissions(this, requestPermissions, CODE_REQUEST_ALL_PERMISSIONS);
        }
    }

3. 文件读取需要使用FileProvider！！（包名.fileprovider）

开启摄像机之前需要配置，否则空指针！

   Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
                //调用照相机
                String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/recordVideo/testSys.mp4";
                  // 将路径转换为Uri对象
                Uri uri = Uri.fromFile(new File(filePath)); 
                intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
                 // 表示录制完后保存的录制，如果不写，则会保存到默认的路径，在onActivityResult()的回调，通过intent.getData中返回保存的路径
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);   
                String photoName = "${System.currentTimeMillis()}.mp4";

                File picture = new File(filePath,photoName);
                //注意这里是包名
                intent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(this,"fatcats.top.yunqiang.fileprovider",picture));

                startActivityForResult(intent,RequestCode);

异常如下：

• 回调接收（两种方法任选其一）

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode==RequestCode) {
            if (resultCode == Activity.RESULT_OK) {
                //1.获取查询视频文件路径的Uri 可以直接获取到uri，再通过播放器直接播放
               Uri uriss = data.getData();
                Uri uri = data.getData();
                //2.通过Content Provider查询包含视频文件路径的记录
                Cursor cursor = getContentResolver().query(uri, null, null, null, null);
                if (cursor.moveToFirst()) {
                    //获取视频文件路径
                    videoPath = cursor.getString(cursor.getColumnIndex("_data"));
                    Log.d(TAG, videoPath);
                }
            }
        }
        super.onActivityResult(requestCode,resultCode,data);
    }

• 主配置文件配置FileProvider

        <provider
            android:authorities="fatcats.top.yunqiang.fileprovider"
            android:name="androidx.core.content.FileProvider"
            android:grantUriPermissions="true"
            >
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths"/>
        </provider>

• xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
		    <paths xmlns:android="http://schemas.android.com/apk/res/android">
		    <external-path path="." name="external_path_root"/>
</paths>

2.具体实现

• 完整java代码实现

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.VideoView;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.FileProvider;

import java.io.File;


public class MediaRec extends AppCompatActivity implements View.OnClickListener{
    private static final String TAG = "MediaRec ";
    private final int CODE_REQUEST_ALL_PERMISSIONS = 0x10;
    static final int RequestCode=1;
    String videoPath;
    private final String[] requestPermissions = {
            Manifest.permission.RECORD_AUDIO,
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE,
            Manifest.permission.READ_EXTERNAL_STORAGE
    };

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

        applyAllNeedPermissions();

        videoPath="";
    }

    private void applyAllNeedPermissions() {
        if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            // 一次性申请需要的所有权限
            ActivityCompat.requestPermissions(this, requestPermissions, CODE_REQUEST_ALL_PERMISSIONS);
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){    
            case R.id.camer:
                Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
                //调用照相机
                String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/recordVideo/testSys.mp4";
                Uri uri = Uri.fromFile(new File(filePath));   // 将路径转换为Uri对象
                intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);    // 表示录制完后保存的录制，如果不写，则会保存到默认的路径，在onActivityResult()的回调，通过intent.getData中返回保存的路径
                String photoName = "${System.currentTimeMillis()}.mp4";

                File picture = new File(filePath,photoName);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(this,"fatcats.top.yunqiang.fileprovider",picture));

                startActivityForResult(intent,RequestCode);
                break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode==RequestCode) {
            if (resultCode == Activity.RESULT_OK) {
                //1.获取查询视频文件路径的Uri
               Uri uriss = data.getData();
                Uri uri = data.getData();
                //2.通过Content Provider查询包含视频文件路径的记录
                Cursor cursor = getContentResolver().query(uri, null, null, null, null);
                if (cursor.moveToFirst()) {
                    //获取视频文件路径
                    videoPath = cursor.getString(cursor.getColumnIndex("_data"));
                    Log.d(TAG, videoPath);
                }
            }
        }
        super.onActivityResult(requestCode,resultCode,data);
    }
}

• 主配置文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:dist="http://schemas.android.com/apk/distribution"
    package="fatcats.top.yunqiang">
    <dist:module dist:instant="true" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:hardwareAccelerated="false"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <provider
            android:authorities="fatcats.top.yunqiang.fileprovider"
            android:name="androidx.core.content.FileProvider"
            android:grantUriPermissions="true"
            >
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths"/>
        </provider>
    </application>

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <!-- 授予该程序录制声音的权限 -->
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <!-- 授予该程序使用摄像头的权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <!-- 授予使用外部存储的权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <uses-permission android:name="android.permission.CAMERA"></uses-permission>
    <uses-feature android:name="android.hardware.camera2"></uses-feature>

</manifest>

好了，这里是基本的实现了