一、activity跳转及传值

当进行activity之间的跳转时我们会遇到这样的问题。首先熟悉下activity之间跳转。Activity跳转与传值，主要是通过Intent类来连接多个Activity，以及传递数据。几种跳转方式可参照Android之Activity的几种跳转方式和Activity的跳转与传值，下面来说说开发时遇到的错误。

1、Internal Server error

在开发工程时，有6个activity，又新增一个activity，这个activity有listview，目的是从这个新增的activity点击item跳转到另外的6个activity，如下代码：

public void onItemClick(AdapterView> parent, View view, int position, longid) {//这里做跳转，跳转到各自对应的页

switch(position) {case 1:

openActivity(TariffMajorGoodsListActivity.class);break;case 2:

openActivity(TariffNativeDirectoryListActivity.class);break;case 3:

openActivity(TariffTaxRateListActivity.class);break;case 4:

openActivity(TariffCommentaryListActivity.class);break;case 5:

openActivity(ClassifyDecisionListActivity.class);break;case 6:

openActivity(ClassifyAdjudicationListActivity.class);break;default:break;

}

}

protected void openActivity(Class>pClass) {

openActivity(pClass,null);

}protected void openActivity(Class>pClass, Bundle pBundle) {

Intent intent= new Intent(this, pClass);if (pBundle != null) {

intent.putExtras(pBundle);

}

startActivity(intent);

}protected voidopenActivity(String pAction) {

openActivity(pAction,null);

}protected voidopenActivity(String pAction, Bundle pBundle) {

Intent intent= newIntent(pAction);if (pBundle != null) {

intent.putExtras(pBundle);

}

startActivity(intent);

}

然而，运行程序时，程序在点击跳转时报Internal Server error错误，直译为“内部服务器错误”，所以错就在Manifest.xml了，就让我们认识下它吧AndroidManifest.xml配置文件详解 ，仔细查看Manifest.xml，确认是正确的，这就纳闷了~~哪里的错了？？？顺手点了根烟，边抽边想，这个调的web接口啊，或许是参数不对，抽完马上查看，果然是这里的问题，立马给它传个参数。

public void onItemClick(AdapterView> parent, View view, int position, longid) {//这里做跳转，跳转到各自对应的页

Bundle mBundle = newBundle();

Gson gson= newGson();switch(position) {case 1:

MajorGoodsEntity majorGoodsEntity= new MajorGoodsEntity(null,datatotal,null,datatotal,null, null, null, null);

mBundle.putSerializable("majorGoods", majorGoodsEntity);

openActivity(TariffMajorGoodsListActivity.class,mBundle);break;case 2:

NativeDirectoryEntity directoryEntity= new NativeDirectoryEntity(null,datatotal);

mBundle.putSerializable("nativeDirectory", directoryEntity);

openActivity(TariffNativeDirectoryListActivity.class,mBundle);break;case 3:

TariffEntity queryEntity= new TariffEntity(null, datatotal,null, null, null, null, null, null, null, null);

mBundle.putSerializable("tariffQueryEntity", gson.toJson(queryEntity,TariffEntity.class));

openActivity(TariffTaxRateListActivity.class,mBundle);break;case 4:

TariffCommentaryItemEntity commentaryItemEntity= new TariffCommentaryItemEntity(null, datatotal, null, null,null);

mBundle.putSerializable("commentaryItemEntity",commentaryItemEntity);

openActivity(TariffCommentaryListActivity.class,mBundle);break;case 5:

ClassifyPublicationEntity entity=new ClassifyPublicationEntity("D",null, datatotal, null, null,null, null, null, null);

mBundle.putSerializable("conditionJSON", gson.toJson(entity, ClassifyPublicationEntity.class));

openActivity(ClassifyDecisionListActivity.class,mBundle);break;case 6:

ClassifyPublicationEntity entitys=new ClassifyPublicationEntity("R",null,datatotal,null,null,null,null,null, null);

mBundle.putSerializable("conditionJSON", gson.toJson(entitys, ClassifyPublicationEntity.class));

openActivity(ClassifyAdjudicationListActivity.class,mBundle);break;default:break;

}

}

哈哈，这样一debug，果然调方法了，此问题完美解决。

原文：http://www.cnblogs.com/squirrel-king/p/5231057.html