Android图片本地载入，显示绝对路线，并载入

Android图片选择与显示

最新推荐文章于 2022-02-11 14:49:18 发布

原创最新推荐文章于 2022-02-11 14:49:18 发布 · 656 阅读

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#图片 #android

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本文介绍了一种在Android应用中实现图片选择的方法，并展示了如何从设备相册选取图片并将其显示在ImageView上。通过Intent和onActivityResult回调，实现了图片的选择与预览功能。

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bitmap bitmap = BitmapFactory.decodeFile("/mnt/sdcard/images/x_1.jpg");
        ImageView imageView = (ImageView) findViewById(R.id.imageView1);
        /* 将Bitmap设定到ImageView */
        imageView.setImageBitmap(bitmap);

        Button button = (Button)findViewById(R.id.button1);
                button.setText("选择图片");
                button.setOnClickListener(new Button.OnClickListener(){
                    @Override
                    public void onClick(View v) {
                        Intent intent = new Intent();
                        /* 开启Pictures画面Type设定为image */
                        intent.setType("image/*");
                        /* 使用Intent.ACTION_GET_CONTENT这个Action */
                        intent.setAction(Intent.ACTION_GET_CONTENT);
                        /* 取得相片后返回本画面 */
                        startActivityForResult(intent, 1);
                    }

               });

    }

    protected String getAbsoluteImagePath(Uri uri)
       {
           // can post image
           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();

           return cursor.getString(column_index);
       }
    @Override
       protected void onActivityResult(int requestCode, int resultCode, Intent data) {
           if (resultCode == RESULT_OK) {
               Uri uri = data.getData();
               Log.e("uri", getAbsoluteImagePath(uri).toString());
               ContentResolver cr = this.getContentResolver();
               try {
                   Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
                   ImageView imageView = (ImageView) findViewById(R.id.imageView1);
                   /* 将Bitmap设定到ImageView */
                   imageView.setImageBitmap(bitmap);
               } catch (FileNotFoundException e) {
                   Log.e("Exception", e.getMessage(),e);
               }
           }
           super.onActivityResult(requestCode, resultCode, data);
    }