页面带参跳转【intent】

第一个Activity——MainIntent:

package jxaly.yj;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainIntent extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final TextView tv = (TextView)findViewById(R.id.tv);
        final EditText et = (EditText)findViewById(R.id.et);
        Button b1 = (Button)findViewById(R.id.b1);
        Button b2 = (Button)findViewById(R.id.b2);
        Button b3 = (Button)findViewById(R.id.b3);
        
        //跳转到百度首页的按钮
        b1.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                Uri uri = Uri.parse("http://www.baidu.com");
                Intent intent = new Intent(Intent.ACTION_VIEW,uri);
                startActivity(intent);
            }
            
        });
        
        //跳转到下一个页面的按钮
        b2.setOnClickListener(new OnClickListener(){
            
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.putExtra("welcome", et.getText().toString());
                intent.setClass(MainIntent.this, WelcomeActivity.class);
                startActivity(intent);
            }
        });
        
        //最简单的按钮
        b3.setOnClickListener(new OnClickListener(){
            
            @Override
            public void onClick(View v) {
                tv.setText(et.getText()+"hello");
            }
        });
    }
}

第二个Activity——WelcomeActivity：

package jxaly.yj;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class WelcomeActivity extends Activity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.welcome);
        
        TextView tv = (TextView)findViewById(R.id.tv2);
        String var = getIntent().getStringExtra("welcome");
        tv.setText( var + ",欢迎来到第二个页面！" );
    }
}

布局配置文件——main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_height="fill_parent" android:layout_width="fill_parent">
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    android:id="@+id/tv"/>
    <EditText android:id="@+id/et" android:layout_height="wrap_content" android:layout_width="match_parent"/>
    <Button android:id="@+id/b1" android:text="测试uri" android:layout_height="wrap_content" android:layout_width="wrap_content"/>
    <Button android:id="@+id/b2" android:text="跳转到下个Activity" android:layout_height="wrap_content" android:layout_marginTop="-50dp" android:layout_width="wrap_content" android:layout_marginLeft="70dp"/>
    <Button android:id="@+id/b3" android:layout_height="wrap_content" android:text="普通单击" android:layout_width="240dp" android:layout_gravity="center"/>
</LinearLayout>

布局配置文件——welcome.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent" android:orientation="vertical">
  
  <TextView android:text="欢迎进入第二个页面！" android:layout_width="wrap_content" 
            android:layout_height="wrap_content" android:id="@+id/tv2"/>
</LinearLayout>

配置文件——AndroidMainFest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="jxaly.yj"
      android:versionCode="1"
      android:versionName="1.0">


    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainIntent"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".WelcomeActivity"></activity>

    </application>
</manifest>