【Android札记】Androd手机拍照或从相册选取图片作为头像

  1 package zhangpgil.photo;  2    3 import java.io.File;  4 import android.support.v7.app.ActionBarActivity;  5 import android.view.View;  6 import android.widget.Button;  7 import android.widget.ImageView;  8 import android.widget.Toast;  9 import android.content.Intent; 10 import android.graphics.Bitmap; 11 import android.net.Uri; 12 import android.os.Bundle; 13 import android.os.Environment; 14 import android.provider.MediaStore; 15   16 public class MainActivity extends ActionBarActivity { 17   18     /* 头像文件 */ 19     private static final String IMAGE_FILE_NAME = "temp_head_image.jpg"; 20   21     /* 请求识别码 */ 22     private static final int CODE_GALLERY_REQUEST = 0xa0; 23     private static final int CODE_CAMERA_REQUEST = 0xa1; 24     private static final int CODE_RESULT_REQUEST = 0xa2; 25   26     // 裁剪后图片的宽(X)和高(Y),480 X 480的正方形。（生成bitmap貌似有时要报错？可试下把大小弄小点） 27     private static int output_X = 480; 28     private static int output_Y = 480; 29   30     private ImageView headImage = null; 31   32     @Override 33     protected void onCreate(Bundle savedInstanceState) { 34         super.onCreate(savedInstanceState); 35         setContentView(R.layout.activity_main); 36   37         headImage = (ImageView) findViewById(R.id.imageView); 38   39         Button buttonLocal = (Button) findViewById(R.id.buttonLocal); 40         buttonLocal.setOnClickListener(new View.OnClickListener() { 41   42             @Override 43             public void onClick(View v) { 44                 choseHeadImageFromGallery(); 45             } 46         }); 47   48         Button buttonCamera = (Button) findViewById(R.id.buttonCamera); 49         buttonCamera.setOnClickListener(new View.OnClickListener() { 50   51             @Override 52             public void onClick(View v) { 53                 choseHeadImageFromCameraCapture(); 54             } 55         }); 56     } 57   58     // 从本地相册选取图片作为头像 59     private void choseHeadImageFromGallery() { 60         Intent intentFromGallery = new Intent(); 61         // 设置文件类型 62         intentFromGallery.setType("image/*"); 63         intentFromGallery.setAction(Intent.ACTION_GET_CONTENT); 64         startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST); 65     } 66   67     // 启动手机相机拍摄照片作为头像 68     private void choseHeadImageFromCameraCapture() { 69         Intent intentFromCapture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 70   71         // 判断存储卡是否可用，存储照片文件 72         if (hasSdcard()) { 73             intentFromCapture.putExtra(MediaStore.EXTRA_OUTPUT, Uri 74                     .fromFile(new File(Environment 75                             .getExternalStorageDirectory(), IMAGE_FILE_NAME))); 76         } 77   78         startActivityForResult(intentFromCapture, CODE_CAMERA_REQUEST); 79     } 80   81     @Override 82     protected void onActivityResult(int requestCode, int resultCode, 83             Intent intent) { 84   85         // 用户没有进行有效的设置操作，返回 86         if (resultCode == RESULT_CANCELED) { 87             Toast.makeText(getApplication(), "取消", Toast.LENGTH_LONG).show(); 88             return; 89         } 90   91         switch (requestCode) { 92         case CODE_GALLERY_REQUEST: 93             cropRawPhoto(intent.getData()); 94             break; 95   96         case CODE_CAMERA_REQUEST: 97             if (hasSdcard()) { 98                 File tempFile = new File( 99                         Environment.getExternalStorageDirectory(),100                         IMAGE_FILE_NAME);101                 cropRawPhoto(Uri.fromFile(tempFile));102             } else {103                 Toast.makeText(getApplication(), "没有SDCard!", Toast.LENGTH_LONG)104                         .show();105             }106  107             break;108  109         case CODE_RESULT_REQUEST:110             if (intent != null) {111                 setImageToHeadView(intent);112             }113  114             break;115         }116  117         super.onActivityResult(requestCode, resultCode, intent);118     }119  120     /**121      * 裁剪原始的图片122      */123     public void cropRawPhoto(Uri uri) {124  125         Intent intent = new Intent("com.android.camera.action.CROP");126         intent.setDataAndType(uri, "image/*");127  128         // 设置裁剪129         intent.putExtra("crop", "true");130  131         // aspectX , aspectY :宽高的比例132         intent.putExtra("aspectX", 1);133         intent.putExtra("aspectY", 1);134  135         // outputX , outputY : 裁剪图片宽高136         intent.putExtra("outputX", output_X);137         intent.putExtra("outputY", output_Y);138         intent.putExtra("return-data", true);139  140         startActivityForResult(intent, CODE_RESULT_REQUEST);141     }142  143     /**144      * 提取保存裁剪之后的图片数据，并设置头像部分的View145      */146     private void setImageToHeadView(Intent intent) {147         Bundle extras = intent.getExtras();148         if (extras != null) {149             Bitmap photo = extras.getParcelable("data");150             headImage.setImageBitmap(photo);151         }152     }153  154     /**155      * 检查设备是否存在SDCard的工具方法156      */157     public static boolean hasSdcard() {158         String state = Environment.getExternalStorageState();159         if (state.equals(Environment.MEDIA_MOUNTED)) {160             // 有存储的SDCard161             return true;162         } else {163             return false;164         }165     }166 }

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     android:layout_width="match_parent" 3     android:layout_height="match_parent" 4     android:orientation="vertical" > 5   6     <ImageView 7         android:id="@+id/imageView" 8         android:layout_width="wrap_content" 9         android:layout_height="wrap_content"10         android:src="@drawable/ic_launcher" />11  12     <Button13         android:id="@+id/buttonLocal"14         android:layout_width="wrap_content"15         android:layout_height="wrap_content"16         android:text="本地相册选取头像" />17  18     <Button19         android:id="@+id/buttonCamera"20         android:layout_width="wrap_content"21         android:layout_height="wrap_content"22         android:text="手机拍照选取头像" />23  24 </LinearLayout>