Will的部落格

此範例為點擊按鈕後, 在textView上顯示user所輸入editText之文字內容

MainActivity.java

package com.example.layout2;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

    EditText firstName, lastName, phoneNum;
    TextView textView;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        firstName = (EditText)findViewById(R.id.firstName);
        lastName = (EditText)findViewById(R.id.lastName);
        phoneNum = (EditText)findViewById(R.id.phoneNum);
        textView = (TextView)findViewById(R.id.textView4);
        
    }
    
    /*在button properties設定on click屬性, 點擊呼叫此方法*/
    public void onClick(View v)
    {
        /*getText()取得text內容, 並用toString()轉成字串, trim()將字串左右旁的空格擷取掉*/
        textView.setText(lastName.getText().toString().trim() + 
                         firstName.getText().toString().trim() +
                         "'s phoneNumber is" + 
                         phoneNum.getText().toString().trim());             
    }
}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.layout.MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="LastName:"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <EditText
            android:id="@+id/lastName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="type ur familyName"
            android:singleLine="true" >

            <requestFocus />
        </EditText>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="FirstName:"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <EditText
            android:id="@+id/firstName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="type your firstName"
            android:singleLine="true" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PhoneNum:"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <EditText
            android:id="@+id/phoneNum"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="(09)52390305"
            android:inputType="phone"
            android:singleLine="true" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/button1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:onClick="onClick"
            android:text="Confirm" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:id="@+id/textView4"
            android:layout_width="match_parent"
            android:layout_height="285dp"
            android:textSize="30sp" />

    </LinearLayout>

</LinearLayout>