Eclipse keys

Format code and xml file structure using "ctrl + shift + F" everywhere so that the code remains consistent and easy to understand. Also correct indentation of the implemented code using "ctrl + I".

How to build NDK projects automatically in ECLIPSE

When editing native JNI code in an Android project using the Android NDK you may configure Eclipse to automatically rebuild your project when editing native code, just as it does for java. The below steps shows how to perform the necessary configuration (note that this requires revision 4 or later of the NDK - previous revisions does not contain the necessary ndk-build binary):

Start by right clicking on your android project (named hello-neon in the below screenshots) with JNI resources, and select Properties. In the resulting dialog, choose the Builders entry in the list to the left and press the New...button:

A new dialog will open presenting a list of builder types. Select the Program type and press the OK button:

In the Main tab, fill in the following:

Name:

NDK Builder

Location:

/opt/android-ndk/ndk-build (or wherever your ndk-build binary is). You may use a variable as in ${system_property:user.home}/lib/android-ndk/ndk-build

Working Directory:

${workspace_loc:/hello-neon} (replace hello-neon with your project name. Press the Browse Workspace... button to select it graphically)

The result should look something like the below:

Now continue with the refresh tab. Make sure the two checkboxes Refresh resources upon completion. and Recursively include sub-folders are checked. Choose the Specific resources radio button and press the Specify Resources...button:

Since the ndk-build process will generate files in the lib folder, we want Eclipse to discover changes made there without having to refresh manually. So select the lib folder in the project (create one if necessary) and press theFinish button:

Now skip the Environment tab and go to the final Build Options tab. Make sure the Run the builder: During auto buildscheckbox is checked.

Since the NDK build only needs to happen when editing files in the jni folder, check that folder and press theFinish button.

Now finally press OK in the builder configuration dialog - the new NDK builder should now be up and running. Try editing any file in the jni folder and check that the Console view produces output from the build process:

Source: http://mobilepearls.com/labs/ndk-builder-in-eclipse/

Get resource id from name in Android

public static int getResId(String variableName, Class<?> c) {

        try {
            Field idField = c.getDeclaredField(variableName);
            return idField.getInt(idField);
        } catch (Exception e) {
            e.printStackTrace();
            return -1;
        }
    }



getResId(disobj.getName(), R.drawable.class);

Get accounts details in Android

Permission:

<uses-permission android:name="android.permission.GET_ACCOUNTS" />

Code:

AccountManager am = AccountManager.get(this);
Account[] accounts = am.getAccounts();

for (Account ac : accounts) {
    String acname = ac.name;
    String actype = ac.type;
    // Take your time to look at all available accounts
    System.out.println("Accounts : " + acname + ", " + actype);
}

Check actype for whatsapp account

if(actype.equals("com.whatsapp")){
    String phoneNumber = ac.name;
}

To read the exception

 private String getStackTrace(Exception e) {
       

Writer writer = new StringWriter();
PrintWriter printWriter = new PrintWriter(writer);
e.printStackTrace(printWriter);
String s = writer.toString();

return s; 

    }

To enable all links clickable

Linkify.addLinks(message, Linkify.ALL)