Android 调用系统相册选择图片并显示

た入场券 2022-09-24 13:23 279阅读 0赞

主要代码：

package wkk.app2;
    
    import android.app.Activity;
    import android.content.Intent;
    import android.database.Cursor;
    import android.graphics.Bitmap;
    import android.graphics.BitmapFactory;
    import android.net.Uri;
    import android.os.Bundle;
    import android.provider.MediaStore;
    import android.support.v7.app.AppCompatActivity;
    import android.view.View;
    import android.widget.ImageView;
    
    public class MainActivity extends AppCompatActivity {
        
    
        //调用系统相册-选择图片
        private static final int IMAGE = 1;
        //所需权限
    //    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
    
        public void onClick(View v) {
            //调用相册
            Intent intent = new Intent(Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
            startActivityForResult(intent, IMAGE);
        }
    
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            //获取图片路径
            if (requestCode == IMAGE && resultCode == Activity.RESULT_OK && data != null) {
                Uri selectedImage = data.getData();
                String[] filePathColumns = {MediaStore.Images.Media.DATA};
                Cursor c = getContentResolver().query(selectedImage, filePathColumns, null, null, null);
                c.moveToFirst();
                int columnIndex = c.getColumnIndex(filePathColumns[0]);
                String imagePath = c.getString(columnIndex);
                showImage(imagePath);
                c.close();
            }
        }
    
        //加载图片
        private void showImage(String imaePath){
            Bitmap bm = BitmapFactory.decodeFile(imaePath);
            ((ImageView)findViewById(R.id.image)).setImageBitmap(bm);
        }
    
    }

xml:

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context="wkk.app2.MainActivity">
    
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="onClick"
            android:text="点击选择图片" />
    
        <ImageView
            android:id="@+id/image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    
    </LinearLayout>

--------------------

2016/12/05 10:17  
Demo下载地址:  
[http://download.csdn.net/detail/w18756901575/9701803][http_download.csdn.net_detail_w18756901575_9701803]

[http_download.csdn.net_detail_w18756901575_9701803]: http://download.csdn.net/detail/w18756901575/9701803