监听多个EditText，只有当它们都有输入后，相应Button才能被点击

来源：互联网发布：淘宝怎么排名靠前编辑：程序博客网时间：2024/05/24 06:48

这篇文章是网上的资源。

public class SomeMonitorEditText implements TextWatcher {   private Button button;   private EditText[] text;   public void SetMonitorEditText(final Button button, final EditText... text) {      this.button = button;      this.text = text;      for (int i = 0; i < text.length; i++) {         if (text[i] != null) {            text[i].addTextChangedListener(SomeMonitorEditText.this);         }      }   }   @Override   public void beforeTextChanged(CharSequence s, int start, int count,         int after) {      // TODO Auto-generated method stub   }   @Override   public void onTextChanged(CharSequence s, int start, int before, int count) {   }   @Override   public void afterTextChanged(Editable s) {      // TODO Auto-generated method stub      for (int i = 0; i < text.length; i++) {         if (text[i].length() == 0) {            button.setBackgroundResource(R.drawable.graylong_btn);            button.setEnabled(false);            return;//这句代码值两千万         } else {            button.setBackgroundResource(R.drawable.red_btn);            button.setEnabled(true);         }      }   }}

主函数的布局文件就不写了，见图片
这里写图片描述

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        EditText et1 = (EditText) findViewById(R.id.et1);        EditText et2 = (EditText) findViewById(R.id.et2);        EditText et3 = (EditText) findViewById(R.id.et3);        EditText et4 = (EditText) findViewById(R.id.et4);        Button btn = (Button) findViewById(R.id.btn);        new SomeMonitorEditText().SetMonitorEditText(btn, et1, et2, et3, et4);        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Toast.makeText(MainActivity.this, "被点击了", Toast.LENGTH_SHORT).show();            }        });    }}

阅读全文

0 0