安卓教程五 使用静态变量在Activity之间传递数据

安卓课程五 使用静态变量在Activity之间传递数据

这次讲解一下如何使用静态变量来传递数据，

原理其实很简单，就是在接收端的Avtivity里面设置static的变量，在发送端这边改变静态变量的值，然后启动意图。

效果图为：

发送端截图：

接收端截图：

?上代码：

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {private Button btn;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        btn = (Button)findViewById(R.id.btOpenOtherActivity);        btn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//定义一个意图Intent intent = new Intent(MainActivity.this,OtherActivity.class);//改变OtherActivity的三个静态变量的值OtherActivity.name = "wulianghuan";OtherActivity.age = "22";OtherActivity.address = "上海闵行";startActivity(intent);}});    }}

?OtherActivity.java

import android.app.Activity;import android.os.Bundle;import android.widget.TextView;import com.example.hello10.R;public class OtherActivity extends Activity {public static String name;public static String age;public static String address;private TextView text_name;private TextView text_age;private TextView text_address;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.other);text_name = (TextView) findViewById(R.id.name);text_age = (TextView) findViewById(R.id.age);text_address = (TextView) findViewById(R.id.address);//设置文本框的数据text_name.setText("姓名："+name);text_age.setText("年龄："+age);text_address.setText("地址:"+address);}}

?strings.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="app_name">hello10</string>    <string name="action_settings">Settings</string>    <string name="tip1">这是：MainActivity</string>    <string name="tip2">使用静态变量传递数据</string>    <string name="tip3">Hello world!</string></resources>

?main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/tip1" />        <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/btOpenOtherActivity"        android:text="@string/tip2"/></LinearLayout>

?other.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:id="@+id/name"        android:text="" />     <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:id="@+id/age"        android:text="" />     <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:id="@+id/address"        android:text="" />   </LinearLayout>

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