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, long id) {
//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 void openActivity(String pAction) {
openActivity(pAction, null);
}
protected void openActivity(String pAction, Bundle pBundle) {
Intent intent = new Intent(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, long id) {
//这里做跳转，跳转到各自对应的页
Bundle mBundle = new Bundle();
Gson gson = new Gson();
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。