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Export the SQLITEDB into .csv or .pdf

If you want to export the sqlite db into .csv  or .pdf. You are going use the following libraries
OPENCSV-2.3.jariTextPDF – 5.2.1.jar
Task of Creating CSV
public class ExportCSVTask extends AsyncTask<String, Void, Boolean> {            private final ProgressDialog dialog = new ProgressDialog(                      MainActivity.this);
           protected void onPreExecute() {                 this.dialog.setMessage("Exporting database...");                 this.dialog.show();            }
           @Override            protected Boolean doInBackground(String... params) {                 File dbFile = getDatabasePath("basic_db");                 File exportDB = new File(Environment.getExternalStorageDirectory(),                            "");                 if (!exportDB.exists()) {                      exportDB.mkdirs();                 }                 File file = new File(exportDB, getDateTime() + ".csv");                 try {                      file.…

Link the TextView without using webview

Java TextView link; link = (TextView) findViewById(R.id.link); link.setMovementMethod(LinkMovementMethod.getInstance());
Strings.xml
<string name="link_google"><u><a href="http://google.co.in">Go to Google</a></u></string>
mainActivity.xml
<TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:textColor="#80BFFF"         android:text="@string/link_google"         android:id="@+id/link"         android:layout_gravity="center_vertical"         />

Identify app is installed in the device

If you want to know the other app is installed or not, just using PackageManager.


public boolean appInstalledOrNot(String uri) {
PackageManager pm = getPackageManager();
boolean app_installed = false;
try {
pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
app_installed = true;
} catch (PackageManager.NameNotFoundException e) {
app_installed = false;
}
return app_installed;
}

String uri means package name like com.example.app. 
if(appInstalledOrNot(com.example.app)==false){ <-- app is not installed--> } else{ <-- app is installed--> }