1、text.xml示例：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ccc">

    <EditText
        android:id="@+id/input"
        android:layout_width="@dimen/dimen_270"
        android:layout_height="wrap_content"
        android:maxLines="1"
        android:hint="请输入内容"
        android:textSize="@dimen/dimen_16"
        android:textColor="@color/color_fff"
        android:layout_marginTop="@dimen/dimen_10" />
    <ImageView
        android:id="@+id/del"
        android:layout_width="@dimen/dimen_14"
        android:layout_height="@dimen/dimen_14"
        android:visibility="gone"
        android:layout_marginTop="@dimen/dimen_28"
        android:src="@mipmap/bonus_envelope_cancel_icon_normal"
        android:layout_toRightOf="@id/input"/>

</RelativeLayout>

 

2.textActivity.java示例：

public class textActivity extends Activity implements View.OnClickListener {
    private EditText input;
    private ImageView inputDel;  //实例化一键清除输入内容

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState)  {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.text);
        initView();
        initListener();

    }

    //对变量进行初始化
    private void initView(){
        inputDel = findViewById(R.id.del);
        input = findViewById(R.id.input);
    }


    //设置监听器
    private void initListener(){
        input.addTextChangedListener(textWatcher);
        inputDel.setOnClickListener(this);
    }

    private TextWatcher textWatcher = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            if (input.getEditableText().length() >= 1){
                inputDel.setVisibility(View.VISIBLE);
            } else{
                inputDel.setVisibility(View.GONE);
            }
        }
    };

    //点击事件（清空）
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.del:
                input.setText("");
                break;
        }
    }
}

 

3、在AndroidManifest.xml中进行注册：

<activity android:name=".textActivity">
    <intent-filter>
         <action android:name="android.intent.action.MAIN" />

         <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>

 

4、效果图如下：

动图展示：