Android中自定义ContentProvider实例

packagecn.testbaidu;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.app.Activity;
importandroid.content.ContentResolver;
importandroid.content.ContentValues;
importandroid.database.Cursor;
/**
*Demo描述:
*应用A(TestBaidu)调用另外一个应用(TestContentProvider)
*中的自定义ContentProvider,即:
*1自定义ContentProvider的使用
*2其它应用调用该ContentProvider
*
*测试方法:
*1依次测试ContentProvider的增查删改(注意该顺序)
*2其它应用查询该ContentProvider的数据
*
*/
publicclassMainActivityextendsActivity{
privateButtonmAddButton;
privateButtonmDeleteButton;
privateButtonmUpdateButton;
privateButtonmQueryButton;
privateButtonmTypeButton;
privateContentResolvermContentResolver;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
privatevoidinit(){
mContentResolver=this.getContentResolver();

mAddButton=(Button)findViewById(R.id.addButton);
mAddButton.setOnClickListener(newClickListenerImpl());

mDeleteButton=(Button)findViewById(R.id.deleteButton);
mDeleteButton.setOnClickListener(newClickListenerImpl());

mUpdateButton=(Button)findViewById(R.id.updateButton);
mUpdateButton.setOnClickListener(newClickListenerImpl());

mQueryButton=(Button)findViewById(R.id.queryButton);
mQueryButton.setOnClickListener(newClickListenerImpl());

mTypeButton=(Button)findViewById(R.id.typeButton);
mTypeButton.setOnClickListener(newClickListenerImpl());

}
privateclassClickListenerImplimplementsOnClickListener{
@Override
publicvoidonClick(Viewv){
switch(v.getId()){
caseR.id.addButton:
Personperson=null;
for(inti=0;i<5;i++){
person=newPerson("xiaoming"+i,"9527"+i,(8888+i));
testInsert(person);
}
break;
caseR.id.deleteButton:
testDelete(1);
break;
caseR.id.updateButton:
testUpdate(3);
break;
caseR.id.queryButton:
//查询表
//queryFromContentProvider(-1);

//查询personid=2的数据
testQuery(2);
break;
caseR.id.typeButton:
testType();
break;
default:
break;
}

}

}
privatevoidtestInsert(Personperson){
ContentValuescontentValues=newContentValues();
contentValues.put("name",person.getName());
contentValues.put("phone",person.getPhone());
contentValues.put("salary",person.getSalary());
UriinsertUri=Uri.parse("content://cn.bs.testcontentprovider/person");
UrireturnUri=mContentResolver.insert(insertUri,contentValues);
System.out.println("新增数据:returnUri="+returnUri);
}

privatevoidtestDelete(intindex){
Uriuri=Uri.parse("content://cn.bs.testcontentprovider/person/"+String.valueOf(index));
mContentResolver.delete(uri,null,null);
}

privatevoidtestUpdate(intindex){
Uriuri=Uri.parse("content://cn.bs.testcontentprovider/person/"+String.valueOf(index));
ContentValuesvalues=newContentValues();
values.put("name","hanmeimei");
values.put("phone","1234");
values.put("salary",333);
mContentResolver.update(uri,values,null,null);
}
privatevoidtestQuery(intindex){
Uriuri=null;
if(index<=0){
//查询表
uri=Uri.parse("content://cn.bs.testcontentprovider/person");
}else{
//按照id查询某条数据
uri=Uri.parse("content://cn.bs.testcontentprovider/person/"+String.valueOf(index));
}

//对应上面的:查询表
//Cursorcursor=mContentResolver.query(uri,null,null,null,null);

//对应上面的:查询personid=2的数据
//注意:因为name是varchar字段的,所以应该写作"name="xiaoming1""
//若写成"name=xiaoming1"查询时会报错
Cursorcursor=mContentResolver.query(uri,null,"name="xiaoming1"",null,null);

while(cursor.moveToNext()){
intpersonid=cursor.getInt(cursor.getColumnIndex("personid"));
Stringname=cursor.getString(cursor.getColumnIndex("name"));
Stringphone=cursor.getString(cursor.getColumnIndex("phone"));
intsalary=cursor.getInt(cursor.getColumnIndex("salary"));
System.out.println("查询得到:personid="+personid+",name="+name+",phone="+phone+",salary="+salary);
}
cursor.close();
}

privatevoidtestType(){
UridirUri=Uri.parse("content://cn.bs.testcontentprovider/person");
StringdirType=mContentResolver.getType(dirUri);
System.out.println("dirType:"+dirType);

UriitemUri=Uri.parse("content://cn.bs.testcontentprovider/person/3");
StringitemType=mContentResolver.getType(itemUri);
System.out.println("itemType:"+itemType);
}
}