android之activity间传输数据

MainActivity如下：

package com.example.helloworld;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 main_button1 = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//初始化布局文件中控件到逻辑控制文件中findView();//声明意图（计划），从哪一个Acivity传递到另外哪一个Activityfinal Intent intent = new Intent(this, TestActivity.class);//往Intent中存放简单参数intent.putExtra("username", "i am little android");//往Intent中存放bundle对象Bundle bundle = new Bundle();bundle.putString("password", "123456");intent.putExtras(bundle);//采取匿名函数为按钮设置单击事件main_button1.setOnClickListener(new OnClickListener() {public void onClick(View view) {//转到下一个activityMainActivity.this.startActivity(intent);}});}/** * Activity创建时初始化控件 */private void findView(){main_button1 = (Button) findViewById(R.id.main_button1);}}

MainActivity布局如下：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    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=".MainActivity" >    <Button        android:id="@+id/main_button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="38dp"        android:text="传递数据到TestActivty" /></RelativeLayout>

TestActivity如下：

package com.example.helloworld;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.widget.TextView;public class TestActivity extends Activity{private TextView tv1_test = null;private TextView tv2_test = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.test);findView();//得到前一个Activity传递的IntentIntent intent = getIntent();String username = intent.getStringExtra("username");//得到前一个activity封装在intent中的bundleBundle bundle = intent.getExtras();String password = (String) bundle.get("password");tv1_test.setText(username);tv2_test.setText(password);}/** * Activity创建时初始化控件 */private void findView(){tv1_test = (TextView) findViewById(R.id.test_tv1);tv2_test = (TextView) findViewById(R.id.test_tv2);}}

TestActivity布局如下：

<?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"    android:background="@android:color/white">        <TextView        android:id="@+id/test_tv1"        android:layout_width="match_parent"        android:layout_height="wrap_content"/>    <TextView        android:id="@+id/test_tv2"        android:layout_width="match_parent"        android:layout_height="wrap_content"/></LinearLayout>

AndroidManifest.xml文件中别忘了配置activity

        <activity            android:name="com.example.helloworld.MyMainActivity"            android:label="@string/title_activity_my_main" >        </activity>         <activity            android:name="com.example.helloworld.TestActivity">        </activity>

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