【安卓开发】调用系统相机录像并保存到本地

<uses-feature android:name="android.hardware.camera" android:required="false" />

package video;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.MediaController;
import android.widget.VideoView;
import com.example.myapp_b.R;
public class VideoActivity extends AppCompatActivity {
    VideoView vv;
    static final int REQUEST_VIDEO_CAPTURE = 1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video);
        vv=findViewById(R.id.vv);
    }
    public void takeVideo(View view) {
        Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivityForResult(intent, REQUEST_VIDEO_CAPTURE);
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        //1.获取数据uri
        super.onActivityResult(requestCode, resultCode, intent);
        Uri videoUri = intent.getData();
        //2.实例化媒体控制器
        MediaController controller = new MediaController(this);
        //3.设置播放源
        vv.setVideoURI(videoUri);
        //4.媒体控制器与视频控件相互关联
        controller.setMediaPlayer(vv);
        vv.setMediaController(controller);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="video.VideoActivity">
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="takeVideo"
        android:text="点击录像"></Button>
    <VideoView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/vv"></VideoView>
</LinearLayout>

package video;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.FileProvider;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.EditText;
import android.widget.MediaController;
import android.widget.VideoView;
import com.example.myapp_b.R;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
public class SaveActivity extends AppCompatActivity {
    VideoView vv;
    static final int REQUEST_VIDEO_CAPTURE = 1;
    static final int RESULT_OK=-1;
    String path="";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_save);
        vv=findViewById(R.id.vv);
    }
    public void takeVideo(View view) {
        Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);
        String videoPath= Environment.getExternalStorageDirectory()+"/VIDEO";//设置照片保存路径
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        File file=new File(videoPath, "MP4_" + timeStamp + ".mp4");
        path=file.getAbsolutePath();
        //使用文件提供者获取路径URL
        Uri contentUri= FileProvider.getUriForFile(this,"com.example.android.fileprovider",file);
        //设置传递参数 让相机拍照后保存照片
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,contentUri);
        startActivityForResult(intent, REQUEST_VIDEO_CAPTURE);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        //1.设置扫描意图
        Intent mediaScanIntent=new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        //2.设置路径
        File f=new File(path);
        //3.获取路径
        Uri contenturi=Uri.fromFile(f);//file:///storage/emulated/0/VIDEO/MP4_20211201_213800.mp4
        mediaScanIntent.setData(contenturi);
        System.out.println(contenturi.toString());
        //4.发送广播
        this.sendBroadcast(mediaScanIntent);
        /
        //1.获取数据uri
        super.onActivityResult(requestCode, resultCode, intent);
        Uri videoUri = intent.getData();
        //2.实例化媒体控制器
        MediaController controller = new MediaController(this);
        //3.设置播放源
        vv.setVideoURI(videoUri);
        //4.媒体控制器与视频控件相互关联
        controller.setMediaPlayer(vv);
        vv.setMediaController(controller);
    }
}

 <uses-feature
        android:name="android.hardware.camera"
        android:required="false" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />

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