Question

我创建了一个CameraSurfaceView.java

我在containerView中添加了cameraSurfaceView。

另外，我输入了权限和功能。

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

但它没有用。

我该如何解决这个问题？

这是我的示例代码，

activity_main.xml中

<?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:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity">

    <FrameLayout
        android:id="@+id/cameraPreview"
        android:layout_width="350dp"
        android:layout_height="350dp"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

MainActivity.java

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.widget.FrameLayout;

public class MainActivity extends Activity {
    FrameLayout containerView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().setFormat(PixelFormat.UNKNOWN);

        containerView= (FrameLayout)findViewById(R.id.camerapreview);

        CameraSurfaceView cameraSurfaceView = new CameraSurfaceView(MainActivity.this);
        containerView.addView(cameraSurfaceView);
    }

}

CameraSurfaceView.java

import android.content.Context;
import android.hardware.Camera;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

import java.io.IOException;

public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
Camera camera = null;
SurfaceHolder surfaceHolder;
boolean previewing = false;

public CameraSurfaceView(Context context) {
    super(context);
    surfaceHolder = getHolder();
    if (surfaceHolder != null) {
        surfaceHolder.addCallback(this);
    }
}


@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    if(previewing){
        camera.stopPreview();
        previewing = false;
    }

    if (camera != null){
        try {
            camera.setPreviewDisplay(surfaceHolder);
            camera.startPreview();
            previewing = true;
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    camera = Camera.open();
    camera.setDisplayOrientation(90);
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    camera.stopPreview();
    camera.release();
    camera = null;
    previewing = false;
}

感谢。

Answer 1

您还需要在CameraSurfaceView

中传递相机对象

 public CameraSurfaceView(Context context,Camera camera) {
        super(context);
        this.camera = camera;
        surfaceHolder = getHolder();
        if (surfaceHolder != null) {
            surfaceHolder.addCallback(this);
        }
    }

在你的主要活动中，你需要打开相机//初始化，

private Camera mCamera;

    CameraSurfaceView cameraSurfaceView = new CameraSurfaceView(MainActivity.this,mCamera);

android中的自定义相机类

1 个答案: