android页面2

深藏阁楼爱情的钟 2022-01-23 13:15 156阅读 0赞

package s1.ppp.com;
    
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.text.TextUtils;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;
    
    public class M2Activity extends AppCompatActivity {
    
        private Button btn_M2_01 = null;
        private EditText et01 = null;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_m2);
             btn_M2_01 = (Button)findViewById(R.id.btn_M2_01);
             et01 = (EditText) findViewById(R.id.et01);
        }
    
        public void getText_et01(View view) {
            if (et01 == null || btn_M2_01 == null) return;
    
            String text = et01.getText().toString().trim();
            if (TextUtils.isEmpty(text)) {
               Toast.makeText(M2Activity.this, "手机号不能为空", Toast.LENGTH_LONG).show();
                return;
            }
    
           Toast.makeText(M2Activity.this, "你输入的是:" + text, Toast.LENGTH_LONG).show();
    
            et01.clearComposingText();
            Log.d("tagsss","getText方法");
        }
    }

布局文件

<?xml version="1.0" encoding="utf-8"?>
    <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".M2Activity">
    
        <EditText
            android:id="@+id/et01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="98dp"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="99dp"
            android:ems="10"
            android:hint="请输入手机号"
            android:inputType="phone"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    
        <Button
            android:id="@+id/btn_M2_01"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="161dp"
            android:layout_marginTop="30dp"
            android:layout_marginEnd="162dp"
            android:onClick="getText_et01"
            android:text="确定"
            android:textAlignment="center"
            android:textSize="18sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/et01" />
    
    </android.support.constraint.ConstraintLayout>