这篇文字是讲怎样创建2个Activity以及这2个Activity直接的数据传输
1、首先创建第一个Activity,SecondLessonDemo1.java
1 package com.example.helloworld; 2 import android.app.Activity; 3 import android.content.Intent; 4 import android.net.Uri; 5 import android.os.Bundle; 6 import android.view.View; 7 import android.view.View.OnClickListener; 8 import android.widget.Button; 9 10 public class SecondLessonDemo1 extends Activity { 11 12 private Button myButton = null; 13 14 @Override 15 public void onCreate(Bundle savedInstanceState) { 16 super.onCreate(savedInstanceState); 17 setContentView(R.layout.activity_main); 18 myButton = (Button) findViewById(R.id.myButton); 19 myButton.setOnClickListener(new myButtonListener()); 20 } 21 22 23 class myButtonListener implements OnClickListener { 24 25 public void onClick(View v) { 26 //Intent intent = new Intent(); 27 //intent.putExtra("testIntent", "123"); 28 //// 从哪里跳转,跳转到哪里去 29 //intent.setClass(SecondLessonDemo1.this, SecondLessonDemo2.class); 30 //SecondLessonDemo1.this.startActivity(intent); 31 32 33 Uri uri=Uri.parse("smsto://0800000123"); 34 Intent intent=new Intent(Intent.ACTION_SENDTO,uri); 35 intent.putExtra("sms_body", "今天天气真好"); 36 startActivity(intent); 37 } 38 } 39 }
2、创建第二个Activity,SecondLessonDemo2.java
1 package com.example.helloworld; 2 3 import android.app.Activity; 4 import android.content.Intent; 5 import android.os.Bundle; 6 import android.widget.TextView; 7 8 public class SecondLessonDemo2 extends Activity { 9 10 private TextView myTextView = null; 11 12 @Override 13 protected void onCreate(Bundle savedInstanceState) { 14 // TODO Auto-generated method stub 15 super.onCreate(savedInstanceState); 16 setContentView(R.layout.other); 17 Intent intent=getIntent(); 18 String value=intent.getStringExtra("testIntent"); 19 myTextView = (TextView) findViewById(R.id.myTextView); 20 myTextView.setText(value); 21 } 22 23 }
3、为第一个Activity创建布局文件,activity_main.xml
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="fill_parent" 4 android:layout_height="fill_parent" > 5 6 <TextView 7 android:id="@+id/myTextView" 8 android:layout_width="fill_parent" 9 android:layout_height="wrap_content" 10 android:layout_centerHorizontal="true" 11 android:layout_centerVertical="true" 12 android:padding="@dimen/padding_medium" 13 tools:context=".MainActivity" /> 14 15 <Button 16 android:id="@+id/myButton" 17 android:text="@+string/ok" 18 android:layout_width="fill_parent" 19 android:layout_height="wrap_content" /> 20 21 </RelativeLayout>
4、为第二个Activity创建布局文件,other.xml
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="fill_parent" 4 android:layout_height="fill_parent" > 5 6 <TextView 7 android:id="@+id/myTextView" 8 android:layout_width="fill_parent" 9 android:layout_height="wrap_content"/> 10 </RelativeLayout>
5、注册这两个Activity
1 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 2 package="com.example.helloworld" 3 android:versionCode="1" 4 android:versionName="1.0" > 5 6 <uses-sdk 7 android:minSdkVersion="4" 8 android:targetSdkVersion="15" /> 9 10 <application 11 android:icon="@drawable/ic_launcher" 12 android:label="@string/app_name" 13 android:theme="@style/AppTheme" > 14 <activity 15 android:name=".MainActivity" 16 android:label="@string/title_activity_main" > 17 18 </activity> 19 20 <activity 21 android:name=".SecondLessonDemo1" 22 android:label="@string/other"> 23 <intent-filter> 24 <action android:name="android.intent.action.MAIN" /> 25 26 <category android:name="android.intent.category.LAUNCHER" /> 27 </intent-filter> 28 </activity> 29 <activity 30 android:name=".SecondLessonDemo2" 31 android:label="dd"> 32 </activity> 33 </application> 34 35 </manifest>