我通过对话题的线索负荷去,但我没能找到解决我的问题。传递纬度和经度到另一个活动
我想写这将显示存储在SQLlite DB一旦用户点击了他们应提请在显示地图的另一个活动中的一个条目GPS坐标列表中的应用程序。
我的目录活动看起来像这样:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.coordinates_activity);
mListView = (ListView) findViewById(R.id.listview);
mAdapter = new SimpleCursorAdapter(getBaseContext(),
R.layout.item_layout,
null,
new String[] {LocationsDB.FIELD_ROW_ID, LocationsDB.FIELD_LAT, LocationsDB.FIELD_LNG},
new int[] {R.id.row_id, R.id.row_lat, R.id.row_lgt }, 0);
mListView.setAdapter(mAdapter);
getSupportLoaderManager().initLoader(0, null, this);
mListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View v, int position, long id){
Intent intentlist = new Intent(getApplicationContext(),fromlist.class);
startActivity(intentlist);
}
});
}
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
Uri uri = LocationsContentProvider.CONTENT_URI;
return new CursorLoader(this, uri, null, null, null, null);
}
public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) {
mAdapter.swapCursor(arg1);
}
public void onLoaderReset(Loader<Cursor> arg0) {
mAdapter.swapCursor(null);
}
}
我已经更新了onItemClick到:
mListView.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View v, int position, long id){
TextView tv1=(TextView)v.findViewById(R.id.row_lat);
String lon_map=tv1.getText().toString();
Double lon1 = Double.parseDouble(lon_map);
TextView tv2=(TextView)v.findViewById(R.id.row_lgt);
String lgt_map=tv2.getText().toString();
Double lgt2 = Double.parseDouble(lgt_map);
Intent intentlist = new Intent(getApplicationContext(),fromlist.class);
intentlist.putExtra("lon1", lon1);
intentlist.putExtra("lgt2", lgt2);
startActivity(intentlist);
}
第二个活动是这样的:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fromlist_activity);
double latitude = getIntent().getDoubleExtra("lon1", 0);
double longitude = getIntent().getDoubleExtra("lgt2", 0);
我仍然不能得到第二项活动中的数值为
什么是您的具体问题? – 2014-12-02 21:50:31
您需要使用意图 – SeahawksRdaBest 2014-12-02 21:52:23
如何将存储的R.id.row_lat和R.id.row_lgt的值存储到另一个活动中。 – user1380840 2014-12-02 21:52:57