从一个活动向另一个活动发送额外费用我有一点问题.我已经说过FirstActivity哪个开始TabActivity,我有5个标签.当我发送putExtra(),从,FirstActivity 到TabActivity,没有问题,但我需要发送额外的Activity,它持有的第一个标签TabHost.我正在使用此代码:
TabActivity.class:
int collId = getIntent().getIntExtra("collection_id", 0);
Log.i("Collection ID","Collection ID from SingleCollection.class : "+collId);
intent = new Intent(this, Collection.class);
intent.putExtra("collection_id", collId);
spec = tabHost.newTabSpec("collection").setIndicator("Collection",
res.getDrawable(R.drawable.ic_tab_collection))
.setContent(intent);
tabHost.addTab(spec);
但它并没有真正起作用.我没有收到额外费用Collection.class.
所以我的问题是如何将额外内容发送到标签的内容中TabHost.希望你能理解我...
我有一个放入intJSON 的问题.我有一个整数,我需要保存服务器返回给我的错误代码.问题是我必须解析它JSONObject,但JSONObject只接受字符串,而不是整数.这是我正在尝试做的一个例子:
int errorCode;
JSONObject ErrorCode;
ErrorCode = new JSONObject(errorCode);
有什么建议如何解决这个问题？
我正在使用API Level 7(Android 2.1)构建应用程序,我需要解码由服务器接收的字符串,该字符串使用Base64编码.我知道Base64库包含在Android 2.2中,这就是为什么我直接在我的项目中包含它的源代码.你可以在这里找到源代码:Base64.
所以我的问题是,当我尝试解码字符串中的Base64返回此:BASE 64 : [B@46392d10.
如果我运行服务器发送给我的在线base64解码器的代码我得到这个: le":"en_US","id":2,"error_code":6003,"error_string":"Unsupported Client Version"}
这是我正在使用的代码:
HttpResponse response = httpclient.execute(httppost);
Log.v("Response ","Status line : "+ response.getStatusLine().toString());
String responseBody = EntityUtils.toString(response.getEntity()); //response
Log.v("Response ","Response : "+ responseBody);
String objectIdentificator = responseBody.substring(0,32);
Log.v("Response ","Object Identificator (LONGINT) : "+ objectIdentificator);
String type = responseBody.substring(33,36);
Log.v("Response ","TYPE (UNSIGNED BYTE) : "+ type);
String operation = responseBody.substring(37,40);
Log.v("Response ","OPERATION (UNSIGNED BYTE) : "+ operation);
String objectId = responseBody.substring(41, 73);
Log.v("Response ","UID (CHAR, length …I'm trying to implement in app-billing in my application, but I have a little problem with it. I'm using the example from android developer's site and everytime I start the activity which will connect to the billing service it's showing me a dialog that I cannot connect to server and when I press learn more it's going to a web page which is explaining me to update my android market app, but it's already the latest one. And the other …
我正在尝试将现有数据库从内部存储复制到外部存储,但我有一点问题.它说the file does not exist.这是我实际使用的:
将文件从内部存储复制到外部存储:
private void copyFile(String src, String dst) throws IOException{
FileChannel inChannel = new FileInputStream(src).getChannel();
FileChannel outChannel = new FileOutputStream(dst).getChannel();
try
{
inChannel.transferTo(0, inChannel.size(), outChannel);
}
finally
{
if (inChannel != null)
inChannel.close();
if (outChannel != null)
outChannel.close();
}
}
而我正在使用它:
copyFile("/data/data/com.example.test/databases/database.sqlite","/sdcard/.Example/Data/database.sqlite");
但它不起作用,我很确定内部存储中的数据库是否存在.
如果我在copyFile "/sdcard/.Example/Data/"其创建文件Data中设置为目标文件夹.Example.
有什么建议我缺少什么？
无论如何,我可以将位图对齐ImageView.我的图片视图有问题.我正在通过Java代码设置它的源代码,并且在调整位图大小后将其置于中心位置ImageView,但我想要的是对齐位图.
声明imageView:
<RelativeLayout
android:id="@+id/collection_background"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/actionbar" >
<ImageView
android:id="@+id/collection_image_background"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:contentDescription="@string/stampii" />
// countinue ........
这是我如何设置位图:
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inTempStorage = new byte[8*1024];
ops = BitmapFactory.decodeStream(cis,null,o2);
ImageView view = (ImageView) findViewById (R.id.collection_image_background);
view.setImageBitmap(ops);
任何想法如何做到这一点？
我正在尝试使用Objective-C(IPhone应用程序)中的一些代码在Android中构建应用程序.我正在尝试了解究竟是在做一段代码并将其转换为Java代码,但我想我需要一点点这里有帮助.首先,这里是Obj-C代码:
(BOOL)processSqlInjectQueries:(NSArray *)injectQueries error:(NSError**)error {
//some code
for(NSDictionary * q in injectQueries)
{
if (![q isKindOfClass:[NSDictionary class]]) continue;
StPacketInjectQueryPackage qType = (StPacketInjectQueryPackage)[[q objectForKey:@"type"] intValue];
NSString * query = [q objectForKey:@"query"];
}
//some code
}
在Java中,我试图做这样的事情:
// in some other method :
JSONObject jsonData= new JSONObject();
String authHash = jsonData.getJSONObject("client_auth_hash").toString();
List<Map<String,String>> injectQueries= new ArrayList<Map<String,String>>();
injectQueries.add(new HashMap<String, String>());
//injectQueries.add(authHash);
public boolean processSqlInjectQueries(List<Map<String,String>> injectQueries, Exception error){
if(injectQueries==null || injectQueries.size()==0){
boolean injectsProcessed = this.processSqlInjectQueries(injectQueries,error);
if(!injectsProcessed){
return false;
}
}
Log.i("Info","Processing INJECT Queries...");
boolean res …我正在尝试编写三种不同的方法来在Android中的SQLite数据库中插入,更新和删除数据.到目前为止,我可以在数据库中插入数据,但我无法理解如何where在SQL中添加该子句.这是我正在使用的代码:
该更新方法:
public boolean updateSQL(String tableName,String key,String value){
return updateData(tableName,key,value);
}
private static boolean updateData(String tableName,String key,String value){
sqliteDb = instance.getWritableDatabase();
String where = "id=?";
ContentValues values = new ContentValues();
values.put(key, value);
values.put(key, value);
sqliteDb.update(tableName, values, where, null);
return true;
}
...我正在调用这样的方法:
dbHelper.updateSQL("saved_codes", "code_id", "3");
//dbHelper is an instance to a custom DatabaseHelper class.
..和删除方法:
public boolean deleteSQL(String tableName,String key,String value){
return deleteData(tableName,key,value);
}
private static boolean deleteData(String tableName,String key,String value) {
sqliteDb = …从SQLite数据库中获取所有数据并显示它们时,我遇到了一些问题ListView.我正在使用的代码只显示最后一项.这是我正在使用的代码:
ListView lv1 = (ListView) findViewById(R.id.saved_codes_listview);
SystemDatabaseHelper systemDbHelper = new SystemDatabaseHelper(this, null, 1);
systemDbHelper.initialize(this);
String sqlQuery = "SELECT code_id, code_string FROM saved_codes";
Cursor cursor = systemDbHelper.executeSQLQuery(sqlQuery);
if(cursor.getCount()==0){
Log.i("No Saved Codes","There is no Saved Codes.");
} else if(cursor.getCount()>0){
for(cursor.move(0); cursor.moveToNext(); cursor.isAfterLast()){
String codeString = cursor.getString(cursor.getColumnIndex("code_string"));
ArrayList<String> codes = new ArrayList<String>();
codes.add(codeString);
Log.i("Code String","Code String : "+codeString);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, codes);
lv1.setAdapter(adapter);
}
}
我的数据库中有3个条目作为例子:shosho,bosho,gosho,因此我的listview中只有gosho.知道怎么解决这个问题吗？
提前致谢!
我正在尝试从内部存储中删除我的文件夹,但我正在使用的代码实际上并没有工作.有什么想法吗？
Button login = (Button) findViewById(R.id.login_btn);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name = "/data/data/"+context.getPackageName()+"/files/";
Log.e("","path : "+name);
File myDir = new File(name);
myDir.delete();
boolean iff = myDir.delete();
Log.e("","iff : "+iff);
}
});
按钮点击后得到的结果:
11-17 13:09:58.869: E/(15952): path : /data/data/com.android.test/files/
11-17 13:09:58.869: E/(15952): iff : false