Surface的拍照实现也是很简单，一个小demo就可以把流程看懂了。
话不多说，直接上代码
布局文件
<SurfaceView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/sv_main_surface"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="tackPhoto"
android:text="拍照"
/>
Activity
public class MainActivity extends AppCompatActivity {
private SurfaceView sv_main_surface;
private Camera camera;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface);
//添加surface回调函数
sv_main_surface.getHolder().addCallback(new SurfaceHolder.Callback() {
@Override//控件创建时，打开照相机
public void surfaceCreated(SurfaceHolder holder) {
//打开照相机
camera = Camera.open();
//设置参数
Camera.Parameters parameters=camera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG);
parameters.set("jpeg-quality",85);
camera.setParameters(parameters);
//将画面展示到SurfaceView
try {
camera.setPreviewDisplay(sv_main_surface.getHolder());
} catch (IOException e) {
e.printStackTrace();
}
//开启预览效果
camera.startPreview();
}
@Override//控件改变
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override//控件销毁
public void surfaceDestroyed(SurfaceHolder holder) {
//照相同一时刻只能允许一个软件打开
if(camera!=null){
camera.stopPreview();
camera.release();//释放内存
camera=null;
}
}
});
}
public void takePhoto(View view){
camera.takePicture(null, null, new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] bytes, Camera camera) {
//技术：图片压缩技术（如果图片不压缩，图片大小会过大，会报一个oom内存溢出的错误）
Bitmap bitmap= BitmapFactory.decodeByteArray(bytes,0,bytes.length);
try {
FileOutputStream fos = new FileOutputStream("/mnt/sdcard/qq"+System.currentTimeMillis()+".png");//图片保存路径
bitmap.compress(Bitmap.CompressFormat.PNG,85,fos);//压缩格式，质量，压缩路径
camera.stopPreview();
camera.startPreview();
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
});
}
}
我们还要添加权限
<!--打开照相机的权限--> <uses-permission android:name="android.permission.CAMERA"></uses-permission> <!--创建文件的权限--> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission> <!--写内存卡的权限--> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
就这样一个小案例就完成了
既然可以拍照，那肯定也是可以录像的，所以我们再来看看录像是怎么实现的
布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_media_recorder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.zking.familyapp.MediaRecorderActivity">
<SurfaceView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/sv_media_surface"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
></LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="开始"
android:onClick="start"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="停止"
android:onClick="stop"
/>
</RelativeLayout>
Activity
public class MediaRecorderActivity extends AppCompatActivity {
private SurfaceView sv_media_surface;
private MediaRecorder mediaRecorder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_media_recorder);
sv_media_surface = (SurfaceView) findViewById(R.id.sv_media_surface);
//实例化媒体录制器
mediaRecorder = new MediaRecorder();
}
public void start(View view){
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
//设置格式
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
//设置保存路径
mediaRecorder.setOutputFile("/mnt/sdcard/uu"+System.currentTimeMillis()+".mp4");
mediaRecorder.setPreviewDisplay(sv_media_surface.getHolder().getSurface());
try {
mediaRecorder.prepare();
mediaRecorder.start();
} catch (IOException e) {
e.printStackTrace();
}
}
public void stop(View view){
if(mediaRecorder!=null){
mediaRecorder.stop();
mediaRecorder.release();
mediaRecorder=null;
}
}
}
添加权限
<!-- 录像的权限--> <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持找一找教程网。
