{"id":206098,"date":"2023-08-05T07:48:31","date_gmt":"2023-08-04T23:48:31","guid":{"rendered":"https:\/\/www.idc.net\/help\/206098\/"},"modified":"2023-08-05T07:48:31","modified_gmt":"2023-08-04T23:48:31","slug":"android%e8%b0%83%e7%94%a8camera%e5%ae%9e%e7%8e%b0%e8%87%aa%e5%ae%9a%e4%b9%89%e7%85%a7%e7%9b%b8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/206098\/","title":{"rendered":"Android\u8c03\u7528Camera\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7167\u76f8"},"content":{"rendered":"

\u9996\u5148\u662f\u5e03\u5c40\u6587\u4ef6\uff0c\u7ebf\u6027\u5e03\u5c40\uff0c\u5de6\u8fb9\u4e24\u4e2a\u6309\u94ae\u5782\u76f4\u6446\u653e\uff0c\u53f3\u8fb9\u9884\u89c8\u56fe\u4ee5\u53ca\u7167\u76f8\u83b7\u53d6\u5230\u7684\u56fe\uff1a<\/p>\n

\n \n 
    \n  \n  
  1. <?<\/span>xml<\/span> <\/span>version<\/span>=<\/span>\"1.0\"<\/span> <\/span>encoding<\/span>=<\/span>\"utf-8\"<\/span>?><\/span> <\/span><\/span><\/li>\n  \n  
  2. <<\/span>LinearLayout<\/span> <\/span>xmlns:android<\/span>=<\/span>\"http:\/\/schemas.android.com\/apk\/res\/android\"<\/span> <\/span><\/span><\/li>\n  \n  
  3.     android:layout_width<\/span>=<\/span>\"fill_parent\"<\/span> <\/span><\/span><\/li>\n  \n  
  4.     android:layout_height<\/span>=<\/span>\"fill_parent\"<\/span> <\/span><\/span><\/li>\n  \n  
  5.     android:orientation<\/span>=<\/span>\"horizontal\"<\/span> <\/span>><\/span> <\/span><\/span><\/li>\n  \n  
  6.  <\/span><\/li>\n  \n  
  7.     <<\/span>LinearLayout<\/span> <\/span><\/span><\/li>\n  \n  
  8.         android:layout_width<\/span>=<\/span>\"200dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  9.         android:layout_height<\/span>=<\/span>\"150dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  10.         android:orientation<\/span>=<\/span>\"vertical\"<\/span> <\/span>><\/span> <\/span><\/span><\/li>\n  \n  
  11.  <\/span><\/li>\n  \n  
  12.         <<\/span>Button<\/span> <\/span><\/span><\/li>\n  \n  
  13.             android:id<\/span>=<\/span>\"@+id\/btn1\"<\/span> <\/span><\/span><\/li>\n  \n  
  14.             android:layout_width<\/span>=<\/span>\"80dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  15.             android:layout_height<\/span>=<\/span>\"50dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  16.             android:text<\/span>=<\/span>\"Start takPic\"<\/span> <\/span>\/><\/span> <\/span><\/span><\/li>\n  \n  
  17.  <\/span><\/li>\n  \n  
  18.         <<\/span>Button<\/span> <\/span><\/span><\/li>\n  \n  
  19.             android:id<\/span>=<\/span>\"@+id\/btn2\"<\/span> <\/span><\/span><\/li>\n  \n  
  20.             android:layout_width<\/span>=<\/span>\"80dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  21.             android:layout_height<\/span>=<\/span>\"50dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  22.             android:text<\/span>=<\/span>\"Get Pic\"<\/span> <\/span>\/><\/span> <\/span><\/span><\/li>\n  \n  
  23.     <\/<\/span>LinearLayout<\/span>><\/span> <\/span><\/span><\/li>\n  \n  
  24.  <\/span><\/li>\n  \n  
  25.     <<\/span>LinearLayout<\/span> <\/span><\/span><\/li>\n  \n  
  26.         android:id<\/span>=<\/span>\"@+id\/cameraView\"<\/span> <\/span><\/span><\/li>\n  \n  
  27.         android:layout_width<\/span>=<\/span>\"200dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  28.         android:layout_height<\/span>=<\/span>\"150dip\"<\/span> <\/span><\/span><\/li>\n  \n  
  29.         android:orientation<\/span>=<\/span>\"vertical\"<\/span> <\/span>><\/span> <\/span><\/span><\/li>\n  \n  
  30.     <\/<\/span>LinearLayout<\/span>><\/span> <\/span><\/span><\/li>\n  \n  
  31.  <\/span><\/li>\n  \n  
  32. <\/<\/span>LinearLayout<\/span>><\/span> <\/span><\/span><\/li>\n \n <\/ol><\/pre>\n
    \u4ee3\u7801\uff0c\u90fd\u5199\u5728\u4e00\u8d77\u7684\u3002\u5305\u542b\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684surfaceView\uff08\u7528\u4e8e\u76f8\u673a\u7684\u7167\u76f8\u9884\u89c8\uff09.\u4ee5\u53caactivit\uff1a<\/p>\n
    \n \n 
      \n  \n  
    1. package<\/span> com.nico; <\/span><\/span><\/li>\n  \n  
    2.  <\/span><\/li>\n  \n  
    3. import<\/span> java.io.ByteArrayInputStream; <\/span><\/span><\/li>\n  \n  
    4. import<\/span> java.io.IOException; <\/span><\/span><\/li>\n  \n  
    5.  <\/span><\/li>\n  \n  
    6. import<\/span> android.app.Activity; <\/span><\/span><\/li>\n  \n  
    7. import<\/span> android.content.Context; <\/span><\/span><\/li>\n  \n  
    8. import<\/span> android.graphics.PixelFormat; <\/span><\/span><\/li>\n  \n  
    9. import<\/span> android.graphics.drawable.BitmapDrawable; <\/span><\/span><\/li>\n  \n  
    10. import<\/span> android.graphics.drawable.Drawable; <\/span><\/span><\/li>\n  \n  
    11. import<\/span> android.hardware.Camera; <\/span><\/span><\/li>\n  \n  
    12. import<\/span> android.os.Bundle; <\/span><\/span><\/li>\n  \n  
    13. import<\/span> android.os.Environment; <\/span><\/span><\/li>\n  \n  
    14. import<\/span> android.util.Log; <\/span><\/span><\/li>\n  \n  
    15. import<\/span> android.view.SurfaceHolder; <\/span><\/span><\/li>\n  \n  
    16. import<\/span> android.view.SurfaceView; <\/span><\/span><\/li>\n  \n  
    17. import<\/span> android.view.View; <\/span><\/span><\/li>\n  \n  
    18. import<\/span> android.view.Window; <\/span><\/span><\/li>\n  \n  
    19. import<\/span> android.view.WindowManager; <\/span><\/span><\/li>\n  \n  
    20. import<\/span> android.view.View.OnClickListener; <\/span><\/span><\/li>\n  \n  
    21. import<\/span> android.widget.Button; <\/span><\/span><\/li>\n  \n  
    22. import<\/span> android.widget.LinearLayout; <\/span><\/span><\/li>\n  \n  
    23.  <\/span><\/li>\n  \n  
    24. public<\/span> <\/span>class<\/span> Test <\/span>extends<\/span> Activity <\/span>implements<\/span> OnClickListener { <\/span><\/span><\/li>\n  \n  
    25.     \/** Called when the activity is first created. *\/<\/span> <\/span><\/span><\/li>\n  \n  
    26.  <\/span><\/li>\n  \n  
    27.     \/\/ camera \u7c7b<\/span> <\/span><\/span><\/li>\n  \n  
    28.     private<\/span> Camera camera = <\/span>null<\/span>; <\/span><\/span><\/li>\n  \n  
    29.     \/\/ \u7ee7\u627fsurfaceView\u7684\u81ea\u5b9a\u4e49view \u7528\u4e8e\u5b58\u653e\u7167\u76f8\u7684\u56fe\u7247<\/span> <\/span><\/span><\/li>\n  \n  
    30.     private<\/span> CameraView cv = <\/span>null<\/span>; <\/span><\/span><\/li>\n  \n  
    31.  <\/span><\/li>\n  \n  
    32.     \/\/ \u56de\u8c03\u7528\u7684picture\uff0c\u5b9e\u73b0\u91cc\u8fb9\u7684onPictureTaken\u65b9\u6cd5\uff0c\u5176\u4e2dbyte[]\u6570\u7ec4\u5373\u4e3a\u7167\u76f8\u540e\u83b7\u53d6\u5230\u7684\u56fe\u7247\u4fe1\u606f<\/span> <\/span><\/span><\/li>\n  \n  
    33.     private<\/span> Camera.PictureCallback picture = <\/span>new<\/span> Camera.PictureCallback() { <\/span><\/span><\/li>\n  \n  
    34.  <\/span><\/li>\n  \n  
    35.         @Override<\/span> <\/span><\/span><\/li>\n  \n  
    36.         public<\/span> <\/span>void<\/span> onPictureTaken(<\/span>byte<\/span>[] data, Camera camera) { <\/span><\/span><\/li>\n  \n  
    37.             \/\/ \u4e3b\u8981\u5c31\u662f\u5c06\u56fe\u7247\u8f6c\u5316\u6210drawable\uff0c\u8bbe\u7f6e\u4e3a\u56fa\u5b9a\u533a\u57df\u7684\u80cc\u666f\uff08\u5c55\u793a\u56fe\u7247\uff09\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u76f4\u63a5\u5728\u5e03\u5c40\u6587\u4ef6\u91cc\u653e\u4e00\u4e2asurfaceView\u4f9b\u4f7f\u7528\u3002<\/span> <\/span><\/span><\/li>\n  \n  
    38.             ByteArrayInputStream bais = new<\/span> ByteArrayInputStream(data); <\/span><\/span><\/li>\n  \n  
    39.             Drawable d = BitmapDrawable.createFromStream(bais, Environment <\/span><\/li>\n  \n  
    40.                     .getExternalStorageDirectory().getAbsolutePath() <\/span><\/li>\n  \n  
    41.                     + \"\/img.jpeg\"<\/span>); <\/span><\/span><\/li>\n  \n  
    42.             l.setBackgroundDrawable(d); <\/span><\/li>\n  \n  
    43.             try<\/span> { <\/span><\/span><\/li>\n  \n  
    44.             } catch<\/span> (Exception e) { <\/span><\/span><\/li>\n  \n  
    45.                 e.printStackTrace(); <\/span><\/li>\n  \n  
    46.             } <\/span><\/li>\n  \n  
    47.         } <\/span><\/li>\n  \n  
    48.  <\/span><\/li>\n  \n  
    49.     }; <\/span><\/li>\n  \n  
    50.  <\/span><\/li>\n  \n  
    51.     \/\/ \u6309\u94ae \u5e03\u5c40\u7b49\u5b9a\u4e49\uff0c\u4e0d\u4f5c\u8d58\u8ff0<\/span> <\/span><\/span><\/li>\n  \n  
    52.     Button btn1 = null<\/span>; <\/span><\/span><\/li>\n  \n  
    53.     Button btn2 = null<\/span>; <\/span><\/span><\/li>\n  \n  
    54.     LinearLayout l = null<\/span>; <\/span><\/span><\/li>\n  \n  
    55.  <\/span><\/li>\n  \n  
    56.     @Override<\/span> <\/span><\/span><\/li>\n  \n  
    57.     public<\/span> <\/span>void<\/span> onCreate(Bundle savedInstanceState) { <\/span><\/span><\/li>\n  \n  
    58.         super<\/span>.onCreate(savedInstanceState); <\/span><\/span><\/li>\n  \n  
    59.  <\/span><\/li>\n  \n  
    60.         requestWindowFeature(Window.FEATURE_NO_TITLE); <\/span><\/li>\n  \n  
    61.         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, <\/span><\/li>\n  \n  
    62.                 WindowManager.LayoutParams.FLAG_FULLSCREEN); <\/span><\/li>\n  \n  
    63.         getWindow().setFormat(PixelFormat.TRANSLUCENT); <\/span><\/li>\n  \n  
    64.         setContentView(R.layout.main); <\/span><\/li>\n  \n  
    65.  <\/span><\/li>\n  \n  
    66.         l = (LinearLayout) findViewById(R.id.cameraView); <\/span><\/li>\n  \n  
    67.         btn1 = (Button) findViewById(R.id.btn1); <\/span><\/li>\n  \n  
    68.         btn2 = (Button) findViewById(R.id.btn2); <\/span><\/li>\n  \n  
    69.  <\/span><\/li>\n  \n  
    70.         btn1.setOnClickListener(this<\/span>); <\/span><\/span><\/li>\n  \n  
    71.         btn2.setOnClickListener(this<\/span>); <\/span><\/span><\/li>\n  \n  
    72.     } <\/span><\/li>\n  \n  
    73.  <\/span><\/li>\n  \n  
    74.     \/\/\u4e3b\u8981\u7684surfaceView\uff0c\u8d1f\u8d23\u5c55\u793a\u9884\u89c8\u56fe\u7247\uff0ccamera\u7684\u5f00\u5173<\/span> <\/span><\/span><\/li>\n  \n  
    75.     class<\/span> CameraView <\/span>extends<\/span> SurfaceView { <\/span><\/span><\/li>\n  \n  
    76.  <\/span><\/li>\n  \n  
    77.         \/\/<\/span> <\/span><\/span><\/li>\n  \n  
    78.         private<\/span> SurfaceHolder holder = <\/span>null<\/span>; <\/span><\/span><\/li>\n  \n  
    79.  <\/span><\/li>\n  \n  
    80.         public<\/span> CameraView(Context context) { <\/span><\/span><\/li>\n  \n  
    81.             super<\/span>(context); <\/span><\/span><\/li>\n  \n  
    82.             holder = this<\/span>.getHolder(); <\/span><\/span><\/li>\n  \n  
    83.  <\/span><\/li>\n  \n  
    84.             holder.addCallback(new<\/span> SurfaceHolder.Callback() { <\/span><\/span><\/li>\n  \n  
    85.  <\/span><\/li>\n  \n  
    86.                 @Override<\/span> <\/span><\/span><\/li>\n  \n  
    87.                 public<\/span> <\/span>void<\/span> surfaceChanged(SurfaceHolder holder, <\/span>int<\/span> format, <\/span><\/span><\/li>\n  \n  
    88.                         int<\/span> width, <\/span>int<\/span> height) { <\/span><\/span><\/li>\n  \n  
    89.                     Camera.Parameters parameters = camera.getParameters(); <\/span><\/li>\n  \n  
    90.                     \/\/\u4ee5\u4e0b\u6ce8\u91ca\u6389\u7684\u662f\u8bbe\u7f6e\u9884\u89c8\u65f6\u7684\u56fe\u50cf\u4ee5\u53ca\u62cd\u7167\u7684\u4e00\u4e9b\u53c2\u6570<\/span> <\/span><\/span><\/li>\n  \n  
    91.                     \/\/ parameters.setPictureFormat(PixelFormat.JPEG);<\/span> <\/span><\/span><\/li>\n  \n  
    92.                     \/\/ parameters.setPreviewSize(parameters.getPictureSize().width,<\/span> <\/span><\/span><\/li>\n  \n  
    93.                     \/\/ parameters.getPictureSize().height);<\/span> <\/span><\/span><\/li>\n  \n  
    94.                     \/\/ parameters.setFocusMode(\"auto\");<\/span> <\/span><\/span><\/li>\n  \n  
    95.                     \/\/ parameters.setPictureSize(width, height);<\/span> <\/span><\/span><\/li>\n  \n  
    96.                     camera.setParameters(parameters); <\/span><\/li>\n  \n  
    97.                     camera.startPreview(); <\/span><\/li>\n  \n  
    98.                 } <\/span><\/li>\n  \n  
    99.  <\/span><\/li>\n  \n  
    100.                 @Override<\/span> <\/span><\/span><\/li>\n  \n  
    101.                 public<\/span> <\/span>void<\/span> surfaceCreated(SurfaceHolder holder) { <\/span><\/span><\/li>\n  \n  
    102.                     camera = Camera.open(); <\/span><\/li>\n  \n  
    103.  <\/span><\/li>\n  \n  
    104.                     try<\/span> { <\/span><\/span><\/li>\n  \n  
    105.                         \/\/\u8bbe\u7f6ecamera\u9884\u89c8\u7684\u89d2\u5ea6\uff0c\u56e0\u4e3a\u9ed8\u8ba4\u56fe\u7247\u662f\u503e\u659c90\u5ea6\u7684<\/span> <\/span><\/span><\/li>\n  \n  
    106.                         camera.setDisplayOrientation(90<\/span>); <\/span><\/span><\/li>\n  \n  
    107.                         \/\/\u8bbe\u7f6eholder\u4e3b\u8981\u662f\u7528\u4e8esurfaceView\u7684\u56fe\u7247\u7684\u5b9e\u65f6\u9884\u89c8\uff0c\u4ee5\u53ca\u83b7\u53d6\u56fe\u7247\u7b49\u529f\u80fd\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u63a7\u5236camera\u7684\u64cd\u4f5c..<\/span> <\/span><\/span><\/li>\n  \n  
    108.                         camera.setPreviewDisplay(holder); <\/span><\/li>\n  \n  
    109.                     } catch<\/span> (IOException e) { <\/span><\/span><\/li>\n  \n  
    110.                         camera.release(); <\/span><\/li>\n  \n  
    111.                         camera = null<\/span>; <\/span><\/span><\/li>\n  \n  
    112.                         e.printStackTrace(); <\/span><\/li>\n  \n  
    113.                     } <\/span><\/li>\n  \n  
    114.  <\/span><\/li>\n  \n  
    115.                 } <\/span><\/li>\n  \n  
    116.  <\/span><\/li>\n  \n  
    117.                 @Override<\/span> <\/span><\/span><\/li>\n  \n  
    118.                 public<\/span> <\/span>void<\/span> surfaceDestroyed(SurfaceHolder holder) { <\/span><\/span><\/li>\n  \n  
    119.                     \/\/\u987e\u540d\u601d\u4e49\u53ef\u4ee5\u770b\u61c2<\/span> <\/span><\/span><\/li>\n  \n  
    120.                     camera.stopPreview(); <\/span><\/li>\n  \n  
    121.                     camera.release(); <\/span><\/li>\n  \n  
    122.                     camera = null<\/span>; <\/span><\/span><\/li>\n  \n  
    123.                 } <\/span><\/li>\n  \n  
    124.             }); <\/span><\/li>\n  \n  
    125. \/\/          holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);<\/span> <\/span><\/span><\/li>\n  \n  
    126.         } <\/span><\/li>\n  \n  
    127.     } <\/span><\/li>\n  \n  
    128.  <\/span><\/li>\n  \n  
    129.     @Override<\/span> <\/span><\/span><\/li>\n  \n  
    130.     public<\/span> <\/span>void<\/span> onClick(View v) { <\/span><\/span><\/li>\n  \n  
    131.         if<\/span> (v == btn1) { <\/span><\/span><\/li>\n  \n  
    132.             l.removeAllViews(); <\/span><\/li>\n  \n  
    133.             cv = new<\/span> CameraView(Test.<\/span>this<\/span>); <\/span><\/span><\/li>\n  \n  
    134.             LinearLayout.LayoutParams params = new<\/span> LinearLayout.LayoutParams( <\/span><\/span><\/li>\n  \n  
    135.                     LinearLayout.LayoutParams.FILL_PARENT, <\/span><\/li>\n  \n  
    136.                     LinearLayout.LayoutParams.FILL_PARENT); <\/span><\/li>\n  \n  
    137.             l.addView(cv, params); <\/span><\/li>\n  \n  
    138.         } else<\/span> <\/span>if<\/span> (v == btn2) { <\/span><\/span><\/li>\n  \n  
    139.             camera.takePicture(null<\/span>, <\/span>null<\/span>, picture); <\/span><\/span><\/li>\n  \n  
    140.         } <\/span><\/li>\n  \n  
    141.     } <\/span><\/li>\n  \n  
    142. } 
      <\/span><\/li>\n \n <\/ol><\/pre>\n","protected":false},"excerpt":{"rendered":"
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