<?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=".MainActivity">
<!-- 線性佈局 、垂直排列 -->
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- 編輯框
@string/hint 表示 res/values/strings.xml下名為hint的標籤
strings.xml用於字串資源及其格式化
-->
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:text="Name"
android:ems="10"
android:id="@+id/input" android:hint="@string/hint"/>
<Button
android:text="@string/send"
android:layout_width="match_parent"
android:layout_height="wrap_content" android:id="@+id/button2" android:onClick="send"/>
</LinearLayout>
</android.support.constraint.ConstraintLayout>
或者點選text左邊的design進行佈局
package com.android02;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
//定義常數,作為訊息的key
public final static String MESSAGE_KEY="com.android2";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
/**
* 指定佈局(res下的activity_main.xml編譯成r.java)
*/
setContentView(R.layout.activity_main);
}
/**
*響應onclick事件
*/
public void send(View button){
//以id獲取EditText
EditText editText = findViewById(R.id.input);
//獲取編輯框文字
String message = editText.getText().toString();
//activity、service和broadcast receiver通過Intent進行互動
Intent intent = new Intent(this,ReceiveActivity.class);
//在intent中附加資訊
intent.putExtra(MESSAGE_KEY,message);
startActivity(intent);
}
}
右擊java>>new>>Activity>>Empty Activity
然後進入建立頁面指定Activity的名字…
然後它在AndroidManifest.xml
中自動註冊
package com.android02;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class ReceiveActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_receive);
//獲取intent參照
Intent intent = getIntent();
//以MESSAGE_KEY獲取獲取編輯框文字
String message = intent.getStringExtra(MainActivity.MESSAGE_KEY);
//以id獲取TextView
TextView textView = findViewById(R.id.output);
//顯示message
textView.setText(message);
}
}
通過AVD manager 建立虛擬手機或使用真機測試
完成~