用ApplicationContext在Activity与Activity之间传值

class
 MyApp 
extends
 Application {
　private
 String myState;
　public
 String getState() {
　return
 myState;
　}
　public
 
void
 setState(String s) {
　myState = s;
　}
　}

在AndroidManifest.xml的application加个name属性就可以了，如下面所示：

　　android:name=".MyApp" android:icon="@drawable/icon"
　　android:label="@string/app_name">

 

 

class
 Blah 
extends
 Activity {

Override
　public
 
void
 onCreate(Bundle b){
　...
　MyApp appState = ((MyApp)getApplicationContext());
　String state = appState.getState();
　...
　}
　}