Android扩展 - 拍照篇（Camera） - android

1.调用系统摄像头

1.声明常量和变量

2.按钮点击事件，打开系统摄像头

3.重写onActivityResult事件接收拍照返回

4.生成文件名返回路径

5.保存图片

  private static final int TAKE_PICTURE = 1;  class btnGotoActivity02Listener implements OnClickListener {    public void onClick(View v) {      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //调用摄像头拍照      startActivityForResult(intent, TAKE_PICTURE);    }  }  @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    String filename = "";    try {      if (resultCode == Activity.RESULT_OK && requestCode == TAKE_PICTURE) {        Bundle bundle = data.getExtras();        Bitmap bmp = (Bitmap)bundle.get("data");        filename = saveImage(bmp);      }    } catch (Exception err) {      Log.e("Exception", err.getLocalizedMessage());    }  }  public String buildFileName(){    Date now = new Date();    SimpleDateFormat formater = new SimpleDateFormat("yyMMdd_HHmmss");    String SDCARD = Environment.getExternalStorageDirectory() + "/";    String basePath = SDCARD + "dier/photo/";    File dir = new File(basePath);    dir.mkdirs();        return basePath + formater.format(now) + ".jpg";  }    public String saveImage(Bitmap bmp) throws Exception {    File file = new File(buildFileName());    file.createNewFile();    FileOutputStream oStream = new FileOutputStream(file);    bmp.compress(Bitmap.CompressFormat.JPEG, 100, oStream); //100是照片质量，0-100，越大越好    oStream.flush();    oStream.close();    return file.getPath();  }

2.保存完整分辨率的照片

使用上面的方法，保存下来的图片仅为原图的1/4大小，如果需要保存大照片则需要使用下面的方式

缺点：此方法除了在指定的目录下保存图片外，在系统拍照路径下也会保存下一张相同的图片。

  private static final int TAKE_PICTURE = 1;  private String TEMP_FILE = "";    class btnGotoActivity02Listener implements OnClickListener {    public void onClick(View v) {      TEMP_FILE = buildFileName();      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); //调用摄像头拍照      intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(TEMP_FILE))); //另存图片地址      startActivityForResult(intent, TAKE_PICTURE);    }  }    public String buildFileName(){    Date now = new Date();    SimpleDateFormat formater = new SimpleDateFormat("yyMMdd_HHmmss");    String SDCARD = Environment.getExternalStorageDirectory() + "/";    String basePath = SDCARD + "dier/photo/";    File dir = new File(basePath);    dir.mkdirs();        return basePath + formater.format(now) + ".jpg";  }    @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    String filename = "";    try {      if (resultCode == Activity.RESULT_OK && requestCode == TAKE_PICTURE) {        File file = new File(TEMP_FILE);        if(file.exists()){          filename = file.getPath();          Toast.makeText(MainActivity.this, "图片已保存在：" + filename, 3000).show();        }        else {          Toast.makeText(MainActivity.this, "亲，我实在无能为力啊，你是用啥程序照的相片？", 5000).show();        }      }    } catch (Exception err) {      Log.e("Exception", err.getLocalizedMessage());    }  }

Android扩展 - 拍照篇（Camera）

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