android 调用系统相机录像并保存 _android

【android 调用系统相机录像并保存】大鹏一日同风起，扶摇直上九万里。这篇文章主要讲述android 调用系统相机录像并保存相关的知识，希望能为你提供帮助。
1、在androidManifest.xml中添加如下代码

< ?xml version="1.0" encoding="utf-8"?> < manifest xmlns:android="http://schemas.android.com/apk/res/android"

< uses-permission android:name="android.permission.INTERNET"/>
< uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
< uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
< uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"
tools:ignore="ProtectedPermissions" />

< application

< provider
android:authorities="${applicationId}.provider"
android:name="android.support.v4.content.FileProvider"
android:exported="false"
android:grantUriPermissions="true">
< meta-data android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths">
< /meta-data>
< /provider>

< /application> < /manifest>

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

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

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