Android 自动填写短信验证码两种实现（二）

青旅半醒 2022-09-21 05:45 131阅读 0赞

*  使用内容观察者
    
     *  创建一个内容观察者
     *  在MainActivity 中注册内容观察者
     *  权限
     *  Demo

# 使用内容观察者 #

## 1. 创建一个内容观察者 ##

public class MyContentObserver extends ContentObserver { 
    
        private Handler mHandler;//更新ui线程
        private Activity mActivity;//上下文
        /** * Creates a content observer. * * @param handler The handler to run {@link #onChange} on, or null if none. */
        public MyContentObserver(Handler handler,Activity activity) {
            super(handler);
            this.mHandler=handler;
            this.mActivity=activity;
        }
    
        @Override
        public void onChange(boolean selfChange) {
            super.onChange(selfChange);
    
    
    
    
            //数据库发生改变时调用
            Uri uri= Uri.parse("content://sms/");
            //获取ContentResolver对象
            ContentResolver contentResolver=mActivity.getContentResolver();
            Cursor cursor = contentResolver.query(uri, new String[]{
       "address","body"}, null, null, null);
            if(cursor!=null) {
                cursor.moveToFirst();
    
                ContentValues values = new ContentValues();
                values.put("read", "1");        //修改短信为已读模式
    
                String address=cursor.getString(0);
                String body=cursor.getString(1);
    
                Pattern pattern=Pattern.compile("(\\d{6})");
                Matcher matcher=pattern.matcher(body);
                if(matcher.find()){
                    String code=matcher.group(0);
                    Toast.makeText(mActivity, "验证码："+code, Toast.LENGTH_SHORT).show();
                    mHandler.obtainMessage(1,code).sendToTarget();
                }
                cursor.close();//关闭游标
                mActivity.getContentResolver().unregisterContentObserver(this);//注销内容观察者
    
            }
        }
    }

## 2. 在MainActivity 中注册内容观察者 ##

public class MainActivity extends AppCompatActivity { 
        private TextView mTvContent;
        private ContentResolver mContentResolver;
    
        private Handler mHandler=new Handler(){
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                if(msg.what==1){
                    String string= (String) msg.obj;
                    mTvContent.setText(string);
                }
            }
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            mTvContent= (TextView) findViewById(R.id.content);
            mContentResolver=getContentResolver();
            Uri uri= Uri.parse("content://sms/");
            //注册内容观察者
            mContentResolver.registerContentObserver(uri,true,new MyContentObserver(mHandler,this) );
        }
    
    }

## 3 权限 ##

>     <uses-permission android:name="android.permission.READ_SMS"/>

## 4 Demo ##

链接：[http://pan.baidu.com/s/1o7JrM8i][http_pan.baidu.com_s_1o7JrM8i] 密码：apa2

[http_pan.baidu.com_s_1o7JrM8i]: http://pan.baidu.com/s/1o7JrM8i