首先,我们的布局文件为:
MainActivity:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
android:orientation="vertical"
tools:context="com.zking.administrator.g160628_android12_activity.MainActivity">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="请输入用户名:"
android:id="@+id/et_main_uname"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="写心情"
android:onClick="writeThink"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_main_showThink"
/>
</LinearLayout>
ThinkActivity:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="vertical"
tools:context="com.zking.administrator.g160628_android12_activity.ThinkActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_think_showName"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:lines="5"
android:hint="请写心情"
android:gravity="top"
android:id="@+id/et_think_content"
/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="确定"
android:onClick="ok"
/>
</LinearLayout>
1.实现基本数据类型的传递
MainActivity.java:
//传递基本数据类型
intent.putExtra("uname",uname);
intent.putExtra("uage",19);
ThinkActivity.java:
//获取第一个页面传递过来的数据
String uname=getIntent().getStringExtra("uname");
int uage=getIntent().getIntExtra("uage",0);
2.使用集装箱(bundle)传递
MainActivity.java:
//传递BundleBundle bundle=new Bundle();
bundle.putString("uname",uname);
bundle.putInt("uage",19);
intent.putExtra("bundle",bundle);
ThinkActivity.java:
//接受bundle
Bundle bundle=getIntent().getBundleExtra("bundle");
String uname=bundle.getString("uname");
int uage=bundle.getInt("uage");
3.传递对象
MainActivity.java:
Person person1=new Person(1,"静静",19);
intent.putExtra("person1",person1);
ThinkActivity.java:
//获取第一个页面传递过来的数据
Person person1=getIntent().getExtra("person1");
4.传递对象集合
MainActivity.java:
Person person1=new Person(1,"静静",19);
Person person2=new Person(2,"明明",19);
Person person3=new Person(3,"雨田君",19);
ArrayList<Person> persons=new ArrayList<>();
persons.add(person1);
persons.add(person2);
persons.add(person3);
//传递对象集合
intent.putParcelableArrayListExtra("persons",persons);
ThinkActivity.java:
//接受对象集合
List<Person> persons=getIntent().getParcelableArrayListExtra("persons");
tv_think_showName.setTextSize(30);
for (Person person : persons) {
tv_think_showName.setText(tv_think_showName.getText()+"\n"+person.toString());
}
传递基本上是大同小异的,大家可以自己试一试,还是挺好理解的。