用ContentObserver内容观察者写了一个自动填写验证码

<TextView
android:id="@+id/et_validateCode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="请输入验证码"
android:textSize="30dp"

/>

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = (TextView) findViewById(R.id.et_validateCode);
handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Bundle bundle=msg.getData();
textView.setText(bundle.getString("number"));

}
};
this.getContentResolver().registerContentObserver(Uri.parse("content://sms"),true,new MyObserver(handler));
}

//继承ContentObserver 必须重载一个onChange去处理回调
class MyObserver extends ContentObserver{

public MyObserver(Handler handler) {
super(handler);

}
@Override
public void onChange(boolean selfChange) {
Cursor cursor=MainActivity.this.getContentResolver().query(Uri.parse("content://sms/inbox"),null,null,null,"date desc");
if(cursor!=null) {
if (cursor.moveToNext()) {
//我在这里写的一个死的电话号，判断是否是这个手机号，然后在判断是有否有（验证码）
if (cursor.getString(cursor.getColumnIndex("address")).equals("+8615074833565") && cursor.getString(cursor.getColumnIndex("body")).contains("验证码")) {
String date = cursor.getString(cursor.getColumnIndex("body"));
int star = date.indexOf(":");
//在这里判断要截取多少位
String data = date.substring(star + 1, star + 5);
Message ms = new Message();
Bundle bundle = new Bundle();
bundle.putString("number", data);
ms.setData(bundle);
handler.sendMessage(ms);
}
}

}
}
}

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