如何让android相机在多个方向上工作

Question

好的，我有这个相机代码 我想让它在所有方向上都能发挥作用。 在 android 2.2/2.3.3/3.2 上，

我在想类似的事情

if(Build.VERSION.SDK_INT == 8)
do v8 work
else if(Build.VERSION.SDK_INT == 10)
do v10 work
else if(Build.VERSION.SDK_INT == 14)
do v14 work

，但我没有任何运气。 我尝试的一切都失败了。 请帮忙。

Activity.java

package com.ice_os.android.kamura;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.FrameLayout;

public class Activity extends Activity {
    private static final String TAG = "Kamura";
    Camera camera;
    Preview preview;
    Button scan;
    Button preferences;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        if(camera != null)
        {
            camera.release();
            camera = null;
        }
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        scan = (Button) findViewById(R.id.scan);
        scan.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                preview.camera.takePicture(shutterCallback, rawCallback,
                        jpegCallback);
            }
        });
        preferences = (Button)findViewById(R.id.preferences);
        preferences.setOnClickListener( new OnClickListener(){

            @Override
            public void onClick(View v) {
                Intent PreferencesIntent = new Intent(AllergyDetektive.this,Preferences.class);
                startActivity(PreferencesIntent);

            }

        });
        preview = new Preview(this);
        ((FrameLayout) findViewById(R.id.preview)).addView(preview);



        Log.d(TAG, "onCreate'd");

    }

    ShutterCallback shutterCallback = new ShutterCallback() {
        public void onShutter() {
            Log.d(TAG, "onShutter'd");
        }
    };

    /** Handles data for raw picture */
    PictureCallback rawCallback = new PictureCallback() {
        public void onPictureTaken(byte[] data, Camera camera) {
            Log.d(TAG, "onPictureTaken - raw");
        }
    };

    /** Handles data for jpeg picture */
    PictureCallback jpegCallback = new PictureCallback() {
        public void onPictureTaken(byte[] data, Camera camera) {
            FileOutputStream outStream = null;
            try {

                outStream = new FileOutputStream(String.format(
                        "/sdcard/%d.jpg", System.currentTimeMillis()));
                outStream.write(data);
                outStream.close();
                Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
            }
            Log.d(TAG, "onPictureTaken - jpeg");
        }
    };  

//  @Override
//  public void onPause(){
//      super.onPause();
//      camera.lock();
//      if(camera != null)
//      {
//          camera.release();
//          camera = null;
//      }
//      
//  }

}

Preview.java

package com.ice_os.android.kamura;


import java.io.IOException;
import java.lang.reflect.Method;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

class Preview extends SurfaceView implements SurfaceHolder.Callback {
    private static final String TAG = "Preview";

    SurfaceHolder mHolder;
    public Camera camera;

    Preview(Context context) {
        super(context);

        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    }

    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, acquire the camera and tell it where
        // to draw.
        camera = Camera.open();
        try {
            camera.setPreviewDisplay(holder);

            camera.setPreviewCallback(new PreviewCallback() {

                public void onPreviewFrame(byte[] data, Camera arg1) {
                    try {
                        Log.d(TAG, "onPreviewFrame - wrote bytes: "
                                + data.length);
                    }
                    finally {
                    }
                    Preview.this.invalidate();
                }
            });
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Surface will be destroyed when we return, so stop the preview.
        // Because the CameraDevice object is not a shared resource, it's very
        // important to release it when the activity is paused.
        camera.stopPreview();
        camera.release();
        camera = null;
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // Now that the size is known, set up the camera parameters and begin
        // the preview.
        Camera.Parameters parameters = camera.getParameters();
//        if (Build.VERSION.SDK_INT >= 8)
//              setDisplayOrientation(camera, 0);
//          else
//          {
//              if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
//              {
//                  parameters.set("orientation", "portrait");
//                  parameters.set("rotation", 90);
//              }
//              if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
//              {
//                  parameters.set("orientation", "landscape");
//                  parameters.set("rotation", 90);
//              }
//          }  

        parameters.setPreviewSize(w, h);
        parameters.set("orientation","landscape");
        parameters.set("rotation", 0);
        camera.setParameters(parameters);
        camera.startPreview();
    }

    @Override
    public void draw(Canvas canvas) {
        super.draw(canvas);
        Paint p = new Paint(Color.RED);
        Log.d(TAG, "draw");
        canvas.drawText("PREVIEW", canvas.getWidth() / 2,
                canvas.getHeight() / 2, p);
    }

    protected void setDisplayOrientation(Camera camera, int angle){
        Method downPolymorphic;
        try
        {
            downPolymorphic = camera.getClass().getMethod("setDisplayOrientation", new Class[] { int.class });
            if (downPolymorphic != null)
                downPolymorphic.invoke(camera, new Object[] { angle });
        }
        catch (Exception e1)
        {
        }
    }

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.ice_os.android.allergy_detektive"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-feature android:name="android.hardware.camera"/>
    <uses-feature android:name="android.hardware.camera.autofocus"/>
    <uses-permission android:name="android.permission.FLASHLIGHT" android:required="false"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".Activity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Preferences" >
        </activity>
    </application>

</manifest>

main.xml

<Button
    android:id="@+id/scan"
    style="@style/ButtonText"
    android:background="@drawable/black_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_toLeftOf="@+id/preferences"
    android:text="klick" />

<Button
    android:id="@+id/preferences"
    style="@style/ButtonText"
    android:background="@drawable/black_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:text="@string/preferences" />

<FrameLayout
    android:id="@+id/preview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_below="@+id/scan" >

</FrameLayout>

log.txt

02-25 08:33:30.623: D/Kamura(355): onCreate'd
02-25 08:33:32.012: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:32.362: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:32.593: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:32.952: D/dalvikvm(355): GC_FOR_MALLOC freed 930K, 55% free 3027K/6727K, external 1625K/2137K, paused 117ms
02-25 08:33:33.062: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:33.283: D/dalvikvm(355): GC_FOR_MALLOC freed 438K, 56% free 3026K/6727K, external 1625K/2137K, paused 142ms
02-25 08:33:33.413: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:33.693: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 57ms
02-25 08:33:33.703: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:33.922: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 49ms
02-25 08:33:33.932: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:34.152: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 48ms
02-25 08:33:34.162: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:34.393: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 58ms
02-25 08:33:34.413: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:34.633: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 45ms
02-25 08:33:34.653: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:34.864: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:34.882: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:35.112: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 46ms
02-25 08:33:35.132: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:35.344: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:35.363: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:35.603: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 55ms
02-25 08:33:35.623: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:35.842: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 50ms
02-25 08:33:35.862: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:36.092: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 57ms
02-25 08:33:36.112: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:36.323: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:36.343: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:36.573: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:36.593: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:36.802: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 48ms
02-25 08:33:36.822: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:37.052: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 48ms
02-25 08:33:37.073: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:37.293: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 46ms
02-25 08:33:37.303: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:37.533: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 57ms
02-25 08:33:37.553: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:37.763: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:37.782: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:37.992: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 48ms
02-25 08:33:38.012: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:38.253: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 50ms
02-25 08:33:38.274: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:38.504: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:38.523: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:38.733: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 46ms
02-25 08:33:38.753: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:38.972: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:38.982: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:39.213: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 45ms
02-25 08:33:39.223: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:39.453: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 59ms
02-25 08:33:39.473: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:39.693: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 56ms
02-25 08:33:39.713: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:39.922: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:39.942: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:40.162: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:40.172: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:40.403: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:40.433: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:40.653: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 48ms
02-25 08:33:40.663: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:40.892: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:40.902: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:41.132: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:41.153: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:41.364: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 47ms
02-25 08:33:41.383: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:41.623: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 55ms
02-25 08:33:41.643: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:41.862: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 49ms
02-25 08:33:41.882: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:42.113: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 54ms
02-25 08:33:42.152: D/Preview(355): onPreviewFrame - wrote bytes: 447120
02-25 08:33:42.912: D/dalvikvm(355): GC_FOR_MALLOC freed 436K, 56% free 3026K/6727K, external 1625K/2137K, paused 563ms
02-25 08:33:43.393: D/Kamura(355): onCreate'd
02-25 08:33:43.465: D/AndroidRuntime(355): Shutting down VM
02-25 08:33:43.465: W/dalvikvm(355): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-25 08:33:43.483: E/AndroidRuntime(355): FATAL EXCEPTION: main
02-25 08:33:43.483: E/AndroidRuntime(355): java.lang.RuntimeException: Method called after release()
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.hardware.Camera.setHasPreviewCallback(Native Method)
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.hardware.Camera.access$600(Camera.java:114)
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.hardware.Camera$EventHandler.handleMessage(Camera.java:545)
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.os.Looper.loop(Looper.java:123)
02-25 08:33:43.483: E/AndroidRuntime(355):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-25 08:33:43.483: E/AndroidRuntime(355):  at java.lang.reflect.Method.invokeNative(Native Method)
02-25 08:33:43.483: E/AndroidRuntime(355):  at java.lang.reflect.Method.invoke(Method.java:507)
02-25 08:33:43.483: E/AndroidRuntime(355):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-25 08:33:43.483: E/AndroidRuntime(355):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-25 08:33:43.483: E/AndroidRuntime(355):  at dalvik.system.NativeStart.main(Native Method)
02-25 08:33:46.753: I/Process(355): Sending signal. PID: 355 SIG: 9

Answer 1

只是为了理解：相机本身不知道方向，它的CCD芯片
牢固地焊接到主板上，相机提供的原始图片原点位于横向放置的手机左上角，x 方向向右，y 方向向下 - 没有什么可以改变这一事实。您可以处理原始图像以更改其方向。

还要记住，当方向改变时，你的活动会被重新创建，你必须正确处理相机：

• 停止预览，
• 等待表面视图重新配置，
• 再次开始预览

PS：当你的手机要睡眠/锁定屏幕时，启动器可以强制改变布局的方向，即使您禁止它。

Answer 2

您在清单文件中指定 android:screenOrientation="landscape"。因此它可能仅在该方向上运行，因为 bcoz of that.dnt 指定了这一点。