预计阅读时间: 8 分钟
此教程纯属业余，如有言中，不甚荣幸。
开发工具android studio，我们创建一个空白安卓应用。
实现应用内屏幕间的跳转，以及数据传递；
按钮点击事件的处理；
主屏幕代码
public class MainActivity extends Activity implements View.OnClickListener {
public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = (Button) findViewById(R.id.goList);
btn.setOnClickListener(this);
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.goList:
Intent k = new Intent(this, ArrayListViewActivity.class);
TextView textView = (TextView) findViewById(R.id.goList);
k.putExtra(EXTRA_MESSAGE,textView.getText());
startActivity(k);
//finish();
break;
}
}
}
将数据展示到List列表中
public class ArrayListViewActivity extends Activity {
private ListView listView;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
listView = new ListView(this);
listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1,getData()));
setContentView(listView);
}
public List<String> getData(){
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
List<String> data = new ArrayList<String>();
data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");
data.add("测试数据4");
data.add(message);
return data;
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<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="com.fortune.jackson.testapp.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
<Button
android:id="@+id/goList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="go"/>
</RelativeLayout>
