android图像绘制（六）——获取本地图片或拍照图片

从SD卡中获取图片资源，或者拍一张新的图片。

先贴代码

获取图片：

注释：拍照获取的话，可以指定图片的保存地址，在此不说明。

[java]
CharSequence[] items = {"相册", "相机"};
   new AlertDialog.Builder(this)
    .setTitle("选择图片来源")
    .setItems(items, new OnClickListener() {
        public void onClick(DialogInte易做图ce dialog, int which) {
            if( which == SELECT_PICTURE ){
                Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
                intent.addCategory(Intent.CATEGORY_OPENABLE);
                intent.setType("image/*");
                startActivityForResult(Intent.createChooser(intent, "选择图片"), SELECT_PICTURE);
            }else{
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(intent, SELECT_CAMER);
            }
        }
    })
    .create().show();
  CharSequence[] items = {"相册", "相机"};
     new AlertDialog.Builder(this)
      .setTitle("选择图片来源")
      .setItems(items, new OnClickListener() {
    public void onClick(DialogInte易做图ce dialog, int which) {
     if( which == SELECT_PICTURE ){
      Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
      intent.addCategory(Intent.CATEGORY_OPENABLE);
      intent.setType("image/*");
      startActivityForResult(Intent.createChooser(intent, "选择图片"), SELECT_PICTURE);
           }else{
           Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
           startActivityForResult(intent, SELECT_CAMER);
           }
    }
   })
   .create().show();

处理图片，方法一，直接处理返回图片：

注释：

1、网上有说明，直接处理返回的图片是被系统压缩过的，不过自己在测试的过程并没有区别；

2、如果用户不断的重新获取图片的话，必须把现在的Bmp内存释放，否则会报错！ bmp.recycle()。

[java]
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(resultCode == RESULT_OK){
        //选择图片
        Uri uri = data.getData();
        ContentResolver cr = this.getContentResolver();
        try {
            if(bmp != null)//如果不释放的话，不断取图片，将会内存不够
                bmp.recycle();
            bmp = BitmapFactory.decodeStream(cr.openInputStream(uri));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("the bmp toString: " + bmp);
        imageSV.setBmp(bmp);
    }else{
        Toast.makeText(SetImageActivity.this, "请重新选择图片", Toast.LENGTH_SHORT).show();
    }

}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  super.onActivityResult(requestCode, resultCode, data);
  if(resultCode == RESULT_OK){
   //选择图片
   Uri uri = data.getData();
   ContentResolver cr = this.getContentResolver();
   try {
    if(bmp != null)//如果不释放的话，不断取图片，将会内存不够
     bmp.recycle();
    bmp = BitmapFactory.decodeStream(cr.openInputStream(uri));
   } catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   System.out.println("the bmp toString: " + bmp);
   imageSV.setBmp(bmp);
  }else{
   Toast.makeText(SetImageActivity.this, "请重新选择图片", Toast.LENGTH_SHORT).show();
  }

}

处理图片，方法二，获得图片的地址再处理：

[java]
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(resultCode == RESULT_OK){
        Uri uri = data.getData();
        String [] proj={MediaStore.Images.Media.DATA};
        Cursor cursor = managedQuery( uri,
                proj,                 // Which columns to return
                null,       // WHERE clause; which rows to return (all rows)
                null,       // WHERE clause selection arguments (none)
                null);        &n

补充：移动开发 , Android ,