Android相機旋轉

Question

我有一個摩托羅拉Defy操作系統Android 2.1，我用相機預覽製作應用程序。問題在於，相機在Android 2.1上運行良好，但在摩托羅拉，相機旋轉90度。我試圖這樣做：

Parameters parameters = camera.getParameters(); 
parameters.setRotation(90); 

但它不工作。我還沒有找到任何解決方案。

Answer 1

if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) { 
     camera.setDisplayOrientation(90); 
     lp.height = previewSurfaceHeight; 
     lp.width = (int) (previewSurfaceHeight/aspect); 
    } else { 
     camera.setDisplayOrientation(0); 
     lp.width = previewSurfaceWidth; 
     lp.height = (int) (previewSurfaceWidth/aspect); 
    } 

Answer 2

我認爲你不能進行任何設置來支持API 2.2到2.1。該API在您當前的設備庫中沒有。您必須更改爲2.2，支持API 8級。順便說一句，我也嘗試使用API​​級別7：

Parameters parameters = camera.getParameters(); 
parameters.setRotation(90); 

此功能以及對三星Galaxy Tab，但Nexus手機。三星Galaxy Tab使用OS 2.2.0，而Nexus one使用OS 2.2.1。當我嘗試使用API​​級別8時：

camera.setDisplayOrientation(90); 

兩者都很好。所以我認爲當我們在Android OS 2.2.1上使用時，API級別7有問題。

Answer 3

camera.setDisplayOrientation（int）在2.1下不存在！

而這種代碼可正常工作，但在我的里程碑/ DROID :(

Camera.Parameters parameters = camera.getParameters(); 
parameters.set("orientation", "portrait"); 
camera.setParameters(parameters); 

你可以看到更多的http://code.google.com/p/android/issues/detail?id=1193#c42

Answer 4

我發現這個代碼，在Android 1.6的工作和故障轉移（適用於我使用2.1和肖像模式目前無預覽旋轉）

public void surfaceCreated(SurfaceHolder holder){ 
     try{ 
      camera = Camera.open(); 
      setDisplayOrientation(camera, 90); 
      camera.setPreviewDisplay(holder); 
      camera.startPreview(); 
     }catch(IOException e){ 
      Log.d("CAMERA", e.getMessage()); 
     } 

} 

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) 
     { 
     } 
} 

活動有機器人：screenOrientation =「畫像」上的AndroidManifest.xml

http://code.google.com/p/android/issues/detail?id=1193#c42

Answer 5

有在Android文檔的這個官方示例代碼現在（下setDisplayOrientation（））：

public static void setCameraDisplayOrientation(Activity activity, 
     int cameraId, android.hardware.Camera camera) 
{ 
    android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo(); 
    android.hardware.Camera.getCameraInfo(cameraId, info); 
    int rotation = activity.getWindowManager().getDefaultDisplay().getRotation(); 
    int degrees = 0; 
    switch (rotation) 
    { 
    case Surface.ROTATION_0: 
     degrees = 0; 
     break; 
    case Surface.ROTATION_90: 
     degrees = 90; 
     break; 
    case Surface.ROTATION_180: 
     degrees = 180; 
     break; 
    case Surface.ROTATION_270: 
     degrees = 270; 
     break; 
    } 

    int result; 
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) 
    { 
     result = (info.orientation + degrees) % 360; 
     result = (360 - result) % 360; // compensate the mirror 
    } 
    else 
    { // back-facing 
     result = (info.orientation - degrees + 360) % 360; 
    } 
    camera.setDisplayOrientation(result); 
} 

Answer 6

public static void setCameraDisplayOrientation(Activity activity, 
               int cameraId,android.hardware.Camera camera) { 
    android.hardware.Camera.CameraInfo info = 
      new android.hardware.Camera.CameraInfo(); 
    android.hardware.Camera.getCameraInfo(cameraId, info); 
    int rotation = activity.getWindowManager().getDefaultDisplay() 
      .getRotation(); 
    int degrees = 0; 
    switch (rotation) { 
     case Surface.ROTATION_0: degrees = 0; break; 
     case Surface.ROTATION_90: degrees = 90; break; 
     case Surface.ROTATION_180: degrees = 180; break; 
     case Surface.ROTATION_270: degrees = 270; break; 
    } 

    int result; 
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) { 
     result = (info.orientation + degrees) % 360; 
     result = (360 - result) % 360; // compensate the mirror 
    } else { // back-facing 
     result = (info.orientation - degrees + 360) % 360; 
    } 
    camera.setDisplayOrientation(result); 
}