Mostly Used Android Code

Hi Guys!

Today I share the code that are mostly used in the android. I collected the all the small part of the code that are used most of the cases. I hope you also enjoyed with this.

1. How to Disable Home Button

    @Override  
    public void onAttachedToWindow()  
    {    
        this.getWindow().setType(WindowManager.  
          LayoutParams.TYPE_KEYGUARD_DIALOG);       
        super.onAttachedToWindow();    
    }  

2. How to Disable Back Button

    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        return false;  
    }  

3. How to Disable Soft Keypad

    final EditText txtName = (EditText) findViewById(R.id.txtName);  
    txtName.setInputType(InputType.TYPE_NULL);  

4. How to Make Static Rotation/orientation in Android

//if you want to lock screen for always Portrait mode  
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);  
                             or  
//if you want to lock screen for always Landscape mode  
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

5. How to Disable screen Rotation/orientation in Android (better way is java code)

    //put this code in Manifest file, activity tag  
    android:screenOrientation="nosensor"  
    android:configChanges="keyboardHidden|orientation|screenSize"  

    /* or even you can do it by programmatically -- just put  
    Configuration code in onResume method before calling super  
    like this */  
    @Override  
    protected void onResume() {  
        int currentOrientation = getResources().getConfiguration()  
                                   .orientation;  
        if (currentOrientation == Configuration.ORIENTATION_LANDSCAPE)   
        {  
            setRequestedOrientation(ActivityInfo  
                        .SCREEN_ORIENTATION_SENSOR_LANDSCAPE);  
        }  
        else {  
            setRequestedOrientation(ActivityInfo  
                        .SCREEN_ORIENTATION_SENSOR_PORTRAIT);  
        }  
        super.onResume();  
    }  

6. How to Disable Title Bar and Make Full Screen View

//1. put this line to manifest file in Application tag  
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"  
  
//2. put below code in your activity onCreate method  
  
//to disable notification bar (Top Bar)  
        requestWindowFeature(Window.FEATURE_NO_TITLE);          
                           
          
        //to set full screen view  
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  
                     WindowManager.LayoutParams.FLAG_FULLSCREEN);  
          
        //make sure code should be before calling below method  
        setContentView(R.layout.main);  

7. How to Create Alert Dialog Box in Android

    AlertDialog.Builder builder = new AlertDialog.Builder(this);  
    builder.setMessage("App has been started..")  
           .setCancelable(false)  
           .setTitle("Alert Box")             
           .setNegativeButton("OK", new DialogInterface.OnClickListener() {  
               public void onClick(DialogInterface dialog, int id) {  
                    dialog.cancel();  
               }  
           });  
    AlertDialog alert = builder.create();  
    alert.show();  

8. How to Create Toast message in Android

    Toast.makeText(getApplicationContext(), "I am splash message..",   
      Toast.LENGTH_LONG).show();  

9. How to create Progress Dialog in Android

    ProgressDialog dialog = ProgressDialog.show(this, "",  "Loading. Please wait...", true);  

10. Load Home Screen Programmatically in Android

Intent startMain = new Intent(Intent.ACTION_MAIN);  
startMain.addCategory(Intent.CATEGORY_HOME);  
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
startActivity(startMain)  

11. Start/Load Activity from Activity

 
    //put this code where you want to load another Activity  
    Intent intent = new Intent(FirstActivty.this, SecondActivity.class);  
      
    //below 2 lines (Flags) are optional  
    // 1. if set, it will clear the back stack  
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
      
    // 2. If set, this activity will become the start of a new task  
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);  
      
    startActivity(intent);  

12. Make a Phone Call

    String mobileNo = "+9189000000";  
    String uri = "tel:" + mobileNo.trim() ;  
    Intent intent = new Intent(Intent.ACTION_CALL);  
    intent.setData(Uri.parse(uri));  
    startActivity(intent);  
      
    //add permission to Manifest file  
      
      

13. How to check WiFi is Connected or Not

public void chekcWifiConnectDisconnect() {  
  ConnectivityManager connManager = (ConnectivityManager)   
    getSystemService(CONNECTIVITY_SERVICE);  
  NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);  
  
  if (mWifi.isConnected()) {  
   Log.v("Debug", "Wifi is connectd..");     
  } else {  
   Log.v("Debug", "Wifi is not connectd..");     
  }  
  
} 

//dont forget to put Wifi permission in manifest file