3. Comment on the following pointer declaration?
4. Which of the following are correct syntaxes to send an array as a parameter to function
5. Which of the following is not possible in C?
1. Integer
2.
3. ptr is a pointer to integer, p is not.
4. func(&array);
5. None of the mentioned
#include<stdio.h>
void main()
{
int i,j,r=6;
clrscr();
for(i=1;i<=r;i++)
{
for(j=r;j>=i;j--)
{
printf("*");
}
printf("\n");
}
getch();
}
This sample demonstrates how to use the vimeo video with exoplayer
Source Code
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<com.google.android.exoplayer2.ui.PlayerView
android:id="@+id/video_view"
android:layout_width="match_parent"
android:layout_height="300dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package com.logiclab.vimeo;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import com.google.android.exoplayer2.MediaItem;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.ui.PlayerView;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;
import com.vimeo.networking.Configuration;
import com.vimeo.networking.VimeoClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import cz.msebera.android.httpclient.Header;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private static final String VIMEO_ACCESS_TOKEN = "access token";
private static final String VIMDEO_ID = "Your video id";
private PlayerView playerView;
private SimpleExoPlayer player;
//Release references
private boolean playWhenReady = false; //If true the player auto play the media
private int currentWindow = 0;
private long playbackPosition = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Reference exoplayer view
playerView = findViewById(R.id.video_view);
Button playBtn = findViewById(R.id.button2);
playBtn.setOnClickListener(this);
//Build vimeo configuration
configVimeoClient();
} //onCreate
private void createMediaItem(String url) {
MediaItem mediaItem = MediaItem.fromUri(url);
player.setMediaItem(mediaItem);
}
private void initializePlayer() {
//To play streaming media, you need an ExoPlayer object.
//SimpleExoPlayer is a convenient, all-purpose implementation of the ExoPlayer interface.
player = new SimpleExoPlayer.Builder(this).build();
playerView.setPlayer(player);
callVimeoAPIRequest();
//Supply the state information you saved in releasePlayer to your player during initialization.
player.setPlayWhenReady(playWhenReady);
player.seekTo(currentWindow, playbackPosition);
player.prepare();
}
private void callVimeoAPIRequest() {
String videolink = "https://player.vimeo.com/video/" + VIMDEO_ID +"/config";
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
//params.put("key", "value");
// params.put("more", "data");
client.get(videolink, params, new TextHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, String res) {
// called when response HTTP status is "200 OK"
try {
JSONObject jsonObject = new JSONObject(res);
JSONObject req = jsonObject.getJSONObject("request");
JSONObject files = req.getJSONObject("files");
JSONArray progressive = files.getJSONArray("progressive");
JSONObject array1 = progressive.getJSONObject(1);
String v_url=array1.getString("url");
Log.d("URLL ",v_url);
createMediaItem(v_url);
} catch (JSONException e){
e.printStackTrace();
}
}
@Override
public void onFailure(int statusCode, Header[] headers, String res, Throwable t) {
// called when response HTTP status is "4XX" (eg. 401, 403, 404)
}
}
);
}
private void configVimeoClient() {
Configuration.Builder configBuilder =
new Configuration.Builder(MainActivity.VIMEO_ACCESS_TOKEN) //Pass app access token
.setCacheDirectory(this.getCacheDir());
VimeoClient.initialize(configBuilder.build());
}
@Override
public void onClick(View v) {
player.setPlayWhenReady(true);
}
@Override
public void onStart() {
super.onStart();
initializePlayer();
}
}
Android Manifest.xml
set permissions
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
build.gradle(:app)
add
compileOptions {
sourceCompatibility 1.8
targetCompatibility 1.8
}
dependencies//Vimeo Network
implementation "com.vimeo.networking:vimeo-networking:1.1.3"
//Full ExoPlayer library
implementation 'com.google.android.exoplayer:exoplayer:2.12.0'
//Android Async Http Client
implementation 'com.loopj.android:android-async-http:1.4.9'
https://guides.codepath.com/android/Using-Android-Async-Http-Client
Now, we just create an AsyncHttpClient, and then execute a request specifying an anonymous class as a callback:
import com.loopj.android.http.*;
import cz.msebera.android.httpclient.Header;
AsyncHttpClient client = new AsyncHttpClient();
RequestParams params = new RequestParams();
params.put("key", "value");
params.put("more", "data");
client.get("http://www.google.com", params, new TextHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, String res) {
// called when response HTTP status is "200 OK"
}
@Override
public void onFailure(int statusCode, Header[] headers, String res, Throwable t) {
// called when response HTTP status is "4XX" (eg. 401, 403, 404)
}
}
);This will automatically execute the request asynchronously and fire the onSuccess when the response returns a success code and onFailure if the response does not.
Cron Jobs in Ubuntu
Cron is a time-based job scheduling. Cron runs in the background and tasks scheduled with cron, referred to as “cron jobs,” are executed automatically, making cron useful for automating maintenance-related tasks.
Commands
crontab -e : Edit your cron jobs.crontab -l : List the all your cron jobs.crontab -r : Delete the current cron jobs.
The schedule component of the syntax is broken down into 5 different fields, which are written in the following order:
| Field | Allowed Values |
|---|---|
| minute | 0-59 |
| hour | 0-23 |
| Day of the month | 1-31 |
| month | 1-12 or JAN-DEC |
| Day of the week | 0-6 or SUN-SAT |
Format like this
minute hour day_of_month month day_of_week command_to_runTo define the time you can provide concrete values for
minute (m), hour (h), day of month (dom), month (mon),
and day of week (dow) or use '*' in these fields (for 'any').#
Notice that tasks will be started based on the cron's system
daemon's notion of time and timezones.
Examples
Every minutes
* * * * * php /var/www/html/yiitest2.0.39/yii test
12 * * * * - Run the command 12 minutes after every hour
0 4 * * * - Run the command every day at 4:00 AM.
*/15 * * * * - Run the command every 15 minutes
Cronjob in Yii2
In advance template there is already a file yii. And there is no need to run it as php, it is Linux script.
Create a controller in console/controllers
I have created as TestController.php
<?php
namespace console\controllers;
use yii\console\Controller;
/**
* Test controller
*/
class TestController extends Controller {
public function actionIndex() {
echo "cron service runnning";
}
public function actionMail($to) {
echo "Sending mail to " . $to;
}
}
This controller should be use the console controller name space
use yii\console\Controller;
run it as
yii test
#include<stdio.h>
void main(){
int n,count=0;
printf("Enter an number ");
scanf("%d",&n);
while(n>0)
{
n=n/10;
count++;
}
printf("Number of digits %d", count);
}
Output
Source Code
#include<stdio.h>
void main()
{
int i,j,k,rows=7;
clrscr();
for(i=1;i<=rows;i++)
{
//print blank space
for(j=1;j<=rows;j++)
{
if((i+j)<=rows)
printf(" ");
else
printf("*");
}
printf("\n");
}
getch();
}
Video
By the help of MediaController and VideoView classes, we can play the video files in android.
- Dsiplaying loacal videos
- Create an application that displays a video clip, which is stored locally
in our applications “res” directory
- Create a row directory
Paste video file to raw directory
- Add VideoView to your UI
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<VideoView
android:id="@+id/videoView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="0dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.javapackage com.lb.videoplay;
import androidx.appcompat.app.AppCompatActivity;
import android.net.Uri;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
VideoView videoView = (VideoView) findViewById(R.id.videoView);
//Attach a media controller to video view
MediaController mediaController = new MediaController(this);
videoView.setMediaController(mediaController);
mediaController.setAnchorView(videoView);
//Specify the location of media file
Uri uri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.favicon);
videoView.setVideoURI(uri);
videoView.requestFocus();
videoView.start();
}
}
previous tutorial we are discuss about
how to play video on videoview from local file
First set to internet permission
your manifest must include the permissions:
Then and to video url
Check this code
package com.lb.videoplay;
import androidx.appcompat.app.AppCompatActivity;
import android.net.Uri;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
VideoView videoView = (VideoView) findViewById(R.id.videoView);
//Attach a media controller to video view
MediaController mediaController = new MediaController(this);
videoView.setMediaController(mediaController);
mediaController.setAnchorView(videoView);
//add your video URL
Uri uri = Uri.parse("Add URL here..");
videoView.setVideoURI(uri);
videoView.requestFocus();
videoView.start();
}
}
Create file res/xml/network_security_config.xml
<?xml version="1.0" encoding="utf-8"?> <network-security-config> <base-config cleartextTrafficPermitted="true"> <trust-anchors> <certificates src="system" /> </trust-anchors> </base-config> </network-security-config>
New in the AndroidManifest.xml file under application:
android:networkSecurityConfig="@xml/network_security_config"