android图像绘制--获取本地图片或拍照图片代码

作者:袖梨 2022-11-14

从SD卡中获取图片资源,或者拍一张新的图片。
  注释:拍照获取的话,可以指定图片的保存地址,在此不说明。
  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。
  

代码如下 复制代码
CharSequence[] items = {"相册", "相机"};
  new AlertDialog.Builder(this)
  .setTitle("选择图片来源")
  .setItems(items, new OnClickListener() {
  public void onClick(DialogInterface 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(DialogInterface 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()。

代码如下 复制代码

  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:

代码如下 复制代码

  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); // Order-by clause (ascending by name)
  int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
  cursor.moveToFirst();
  String path = cursor.getString(column_index);
  bmp = BitmapFactory.decodeFile(path);
  System.out.println("the path is :" + path);
  }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){
  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); // Order-by clause (ascending by name)
  int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
  cursor.moveToFirst();
  String path = cursor.getString(column_index);
  bmp = BitmapFactory.decodeFile(path);
  System.out.println("the path is :" + path);
  }else{
  Toast.makeText(SetImageActivity.this, "请重新选择图片", Toast.LENGTH_SHORT).show();
  }
  }

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