Android相機、圖冊demo_Android

本文為大家分享了Android相機、圖冊基本demo，供大家參考，具體內容如下

package com.example.democamera; import java.io.File;import java.io.FileNotFoundException;import java.io.IOException;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.content.res.Configuration;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.view.View;import android.widget.ImageView; public class MainActivity extends Activity {   private ImageView iv;  static final int gallery = 1, camera = 2;   @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);     iv = (ImageView) findViewById(R.id.iv_picture);  }   /**   * 啟動圖片畫廊   *    * @param view   */  public void startGallery(View view) {    Intent intent = new Intent();    intent.setAction(Intent.ACTION_GET_CONTENT);    intent.setType("image/*");    startActivityForResult(intent, gallery);   }   /**   * 啟動相機   *    * @param view   */  public void startCamera(View view) {    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);     if (isSDExsit()) {      /* 建立存放圖片檔案夾 */      File dir = new File(Environment.getExternalStorageDirectory()          + "/my");      if (!dir.exists())        dir.mkdirs();      /* 設定圖片參數 得到原尺寸的圖片 */      File file = new File(dir, "aaa.jpg");      intent.putExtra(MediaStore.EXTRA_SCREEN_ORIENTATION,          Configuration.ORIENTATION_UNDEFINED);      intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));    }     startActivityForResult(intent, camera);   }   @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    // TODO Auto-generated method stub    super.onActivityResult(requestCode, resultCode, data);     switch (requestCode) {    case gallery:      /* 做判斷，防止返回報錯 */      if (data != null) {        /*         * 三種方式處理URI         */        Uri uri = data.getData();        iv.setImageURI(uri);         Bitmap bitmap = BitmapFactory            .decodeFile(getPathByUri(uri, this));        iv.setImageBitmap(bitmap);         Bitmap bitmap2 = getBitmapByUri(uri, this);        iv.setImageBitmap(bitmap2);      }       break;     case camera:       if (data != null) {// 這是獲得縮圖的方法        Bitmap b = (Bitmap) data.getExtras().get("data");        iv.setImageBitmap(b);       } else {// 有sd卡得到圖片原圖        Bitmap bitmap = BitmapFactory.decodeFile("sdcard/my/aaa.jpg");//直接這樣做會有發生OOM的風險，Demo簡單這麼處理        iv.setImageBitmap(bitmap);      }      break;    default:      break;    }   }   /**   * Uri-->Bitmap   *    * @param uri   * @param context   * @return   */  public static Bitmap getBitmapByUri(Uri uri, Context context) {    Bitmap bitmap = null;    try {      bitmap = MediaStore.Images.Media.getBitmap(          context.getContentResolver(), uri);    } catch (FileNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();    } catch (IOException e) {      // TODO Auto-generated catch block      e.printStackTrace();    }     return bitmap;  }   /**   * Uri--->Path   *    * @param uri   * @param context   * @return   */  public static String getPathByUri(Uri uri, Context context) {    String path = null;     String[] projection = { MediaStore.Images.Media.DATA };    Cursor cursor = context.getContentResolver().query(uri, projection,        null, null, null);    if (cursor.moveToFirst()) {      int index = cursor          .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);      path = cursor.getString(index);    }    return path;   }   /**   * 判斷SD卡是否存在   *    * @return   */  public static boolean isSDExsit() {    if (Environment.getExternalStorageState().equals(        Environment.MEDIA_MOUNTED)) {      return true;    } else {      return false;    }  } }

下面分享具體Android 調用相機、開啟相簿、裁剪圖片的實現代碼，內容如下

private ImageView iv_user_photo;  private String fileName = "";  private File tempFile;  private int crop = 300;// 裁剪大小  private static final int OPEN_CAMERA_CODE = 10;  private static final int OPEN_GALLERY_CODE = 11;  private static final int CROP_PHOTO_CODE = 12;  private OnClickListener PopupWindowItemOnClick = new OnClickListener() {    @Override    public void onClick(View v) {      menuWindow.dismiss();      switch (v.getId()) {      // 拍照      case R.id.btn_camera:        initFile();        openCamera();        break;      // 相簿      case R.id.btn_gallery:        initFile();        openGallery();        break;      default:        break;      }    }  };  public void initFile() {    if(fileName.equals("")) {      if(FileUtil.existSDCard()) {        String path = Environment.getExternalStorageDirectory() + File.separator + "JanuBookingOnline" + File.separator;        FileUtil.mkdir(path);        Logger.i("path:" + path);        fileName = path + "user_head_photo.jpg";        tempFile = new File(fileName);      } else {        CommonUitl.toast(context, "請插入SD卡");      }    }  }  /**   * 調用相機   */  public void openCamera() {    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 開啟相機    intent.putExtra("output", Uri.fromFile(tempFile));    startActivityForResult(intent, OPEN_CAMERA_CODE);  }  /**   * 開啟相簿   */  public void openGallery() {    Intent intent = new Intent(Intent.ACTION_PICK);// 開啟相簿    intent.setDataAndType(MediaStore.Images.Media.INTERNAL_CONTENT_URI, "image/*");    intent.putExtra("output", Uri.fromFile(tempFile));    startActivityForResult(intent, OPEN_GALLERY_CODE);  }  /**   * 裁剪圖片   * @param uri   */  public void cropPhoto(Uri uri) {    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(uri, "image/*");    intent.putExtra("output", Uri.fromFile(tempFile));    intent.putExtra("crop", true);    intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);    intent.putExtra("outputX", crop);    intent.putExtra("outputY", crop);    startActivityForResult(intent, CROP_PHOTO_CODE);  }  @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (resultCode == 1)      return;    switch (requestCode) {    case OPEN_CAMERA_CODE:      cropPhoto(Uri.fromFile(tempFile));      break;    case OPEN_GALLERY_CODE:      cropPhoto(data.getData());      break;    case CROP_PHOTO_CODE:      try {        BitmapFactory.Options options = new BitmapFactory.Options();        options.inSampleSize = 2;        Bitmap bitmap = BitmapFactory.decodeFile(fileName, options);        if (bitmap != null) {          iv_user_photo.setImageBitmap(bitmap);          CommonUitl.sharedPreferences(context, AppConstants.USER_PHOTO, fileName);        }      } catch (Exception e) {        e.printStackTrace();      }      break;    default:      break;    }    super.onActivityResult(requestCode, resultCode, data);  }

以上就是關於Android相機、圖冊的基本操作內容，希望對大家學習Android軟體編程有所協助。