1、在AndroidManifest.xml中添加如下代码

tools:ignore="ProtectedPermissions" />

android:authorities="${applicationId}.provider"

android:name="android.support.v4.content.FileProvider"

android:exported="false"

android:grantUriPermissions="true">

android:resource="@xml/provider_paths">

2、在res目录下新建一个xml文件夹，并且新建一个provider_paths的xml文件

3、主文件中打开相机

Intent intent=new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

try {

//fileUri=Uri.fromFile(createMediaFile());如果这样写会报错

fileUri= FileProvider.getUriForFile(CameraVideoActivity.this,getApplicationContext().getPackageName() + ".provider",createMediaFile());//这是正确的写法

} catch (IOException e) {

e.printStackTrace();

}

intent.putExtra(MediaStore.EXTRA_OUTPUT,fileUri);

intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY,1);

startActivityForResult(intent,1);

4、创建并保存视频的方法

private File createMediaFile() throws IOException {

if(Utils.checkSDCardAvaliable()) {

if ((Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))) {

// 选择自己的文件夹

String path = Environment.getExternalStorageDirectory().getPath() + "/myvideo/";

// Constants.video_url 是一个常量，代表存放视频的文件夹

File mediaStorageDir = new File(path);

if (!mediaStorageDir.exists()) {

if (!mediaStorageDir.mkdirs()) {

Log.e("TAG", "文件夹创建失败");

return null;

}

}

// 文件根据当前的毫秒数给自己命名

String timeStamp = String.valueOf(System.currentTimeMillis());

timeStamp = timeStamp.substring(7);

String imageFileName = "V" + timeStamp;

String suffix = ".mp4";

File mediaFile = new File(mediaStorageDir + File.separator + imageFileName + suffix);

return mediaFile;

}

}

return null;

}

}

5、重写onActivityResult方法

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if(requestCode==1)

{

if(resultCode==RESULT_OK)

{

Toast.makeText(this, "Video saved to:\n" +

data.getData(), Toast.LENGTH_LONG).show();

vv_play.setVideoURI(fileUri);

vv_play.requestFocus();

}

}

}

6、DDMS截图

原文：https://www.cnblogs.com/maoliyy/p/9284847.html