كيف يمكنك صناعة ازرار خاصة بك على الاندرويد استديوا

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/button_pressed"
          android:state_pressed="true" />
    <item android:drawable="@drawable/button_focused"
          android:state_focused="true" />
    <item android:drawable="@drawable/button_default" />
</selector>
This defines a single drawable resource, which will change its image based on the current state of the button.

• The first 
  

  الكود:

  <item>

   defines the bitmap to use when the button is pressed (activated).
  
  

• The second 
  

  الكود:

  <item>

   defines the bitmap to use when the button is focused (when the button is highlighted using the trackball or directional pad).
  
  

• The third 
  

  الكود:

  <item>

   defines the bitmap to use when the button is in the default state (it's neither pressed nor focused).
  
  

[color:b3de=rgba(0, 0, 0, 0.682352941176471)]الشرح بشكل اوضح على الرابط




https://developer.android.com/guide/topics/ui/controls/button.html







http://www.android-examples.com/stream-play-online-audio-mp3-from-url-in-android/

How to Stream Play online audio mp3 from URL in android without downloading.

Code for Please add internet permission to your AndroidManifest.xml file.
 <uses-permission android:name="android.permission.INTERNET" />
Code for MainActivity.java file.
 package com.playonlineaudiomp3_android_examples.com;

import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;


public class MainActivity extends Activity {

Button buttonStop,buttonStart ;

String AudioURL = "http://www.android-examples.com/wp-content/uploads/2016/04/Thunder-rumble.mp3";

MediaPlayer mediaplayer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

buttonStart = (Button)findViewById(R.id.button1);
buttonStop = (Button)findViewById(R.id.button2);

mediaplayer = new MediaPlayer();
mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

buttonStart.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

try {

mediaplayer.setDataSource(AudioURL);
mediaplayer.prepare();


} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

mediaplayer.start();


}
});

buttonStop.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub


mediaplayer.stop();


}
});
}

}
Code for activity_main.xml layout file.
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.playonlineaudiomp3_android_examples.com.MainActivity" >

<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/button1"
android:layout_centerHorizontal="true"
android:text="Stop Music From URL" />

<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="157dp"
android:text="Start Music From URL" />

</RelativeLayout>
Screenshot:

<Button
android:id="@+id/button3"
android:layout_width="50dp"
android:layout_height="50dp"

android:layout_below="@+id/button3"

android:background="@drawable/button3_custom" />

<Button
android:id="@+id/button2"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_below="@+id/button2"

android:background="@drawable/button_custom2" />

<Button
android:id="@+id/button1"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_below="@+id/button1"

android:background="@drawable/button_custom"
/>

الكود:

<Button
    android:id="@+id/button3"
    android:layout_width="50dp"
    android:layout_height="50dp"

    android:layout_below="@+id/button3"

    android:background="@drawable/button3_custom" />

<Button
    android:id="@+id/button2"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:layout_below="@+id/button2"

    android:background="@drawable/button_custom2"  />

<Button
    android:id="@+id/button1"
    android:layout_width="50dp"
    android:layout_height="50dp"
    android:layout_below="@+id/button1"

    android:background="@drawable/button_custom"
    />

الكود:

package rewayatbaqarah.shhenawy.com.rewayatbaqarah;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;




public class pg2 extends Activity {
    Button buttonStop,buttonStart,buttonPause;

    String AudioURL = "https://a.top4top.net/d_cb4d6f60cd1.mp3";

    MediaPlayer mediaplayer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_pg2);

        buttonStart = (Button)findViewById(R.id.button1);
        buttonStop = (Button)findViewById(R.id.button2);
        buttonPause = (Button)findViewById(R.id.button3);

        mediaplayer = new MediaPlayer();
        mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

        buttonStart.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                try {

                    mediaplayer.setDataSource(AudioURL);
                    mediaplayer.prepare();


                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                mediaplayer.start();


            }
        });

        buttonStop.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                mediaplayer.stop();


            }



        });

        buttonPause.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                mediaplayer.pause();
            }

        });
    }

}