Implicit Intents - Opening Contacts, Opening Browser, Make a Phone call

1.ImplicitIntentsDemo2 Activity:

package com.venkool;

import java.net.URI;

public class ImplicitIntentsDemo2Activity extends Activity {

      /** Called when the activity is first created. */

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            Button btn = (Button) findViewById(R.id.btnClick);

            btn.setOnClickListener(new OnClickListener() {

                  @Override

                  public void onClick(View v) {

                        // TODO Auto-generated method stub

                        Intent intent = new Intent();

                        intent.setAction(android.content.Intent.ACTION_VIEW);

                        intent.setData(ContactsContract.Contacts.CONTENT_URI);

                        startActivity(intent);

                  }

            });

            Button btnBrowser = (Button) findViewById(R.id.btnOpenBrowser);

            btnBrowser.setOnClickListener(new OnClickListener() {

                  @Override

                  public void onClick(View v) {

                        // TODO Auto-generated method stub

                        Intent intent = new Intent(Intent.ACTION_VIEW, Uri

                                    .parse("http://www.google.com"));

                        startActivity(intent);

                  }

            });

            Button btnPhoneCall = (Button) findViewById(R.id.btnMakingPhoneCall);

            btnPhoneCall.setOnClickListener(new OnClickListener() {

                  @Override

                  public void onClick(View v) {

                        // TODO Auto-generated method stub

                        Intent intent = new Intent(Intent.ACTION_CALL, Uri

                                    .parse("tel:1345"));

                        startActivity(intent);

                  }

            });

      }

}

2.main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="@color/Background"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="70dp"

        android:gravity="center"

        android:text="Implicit Intents"

        android:textSize="15dp"

        android:textStyle="bold" />

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="20dp"

        android:gravity="center"

        android:text="Using Unknown Activities"

        android:textSize="20dp" />

    <Button

        android:id="@+id/btnClick"

        android:layout_width="150dp"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="10dp"

        android:gravity="center"

        android:text="Opening Contacts on Mobile" />

    <Button

        android:id="@+id/btnOpenBrowser"

        android:layout_width="150dp"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="10dp"

        android:text="Opening Browser"

        android:textSize="15dp" />

    <Button

        android:id="@+id/btnMakingPhoneCall"

        android:layout_width="150dp"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="10dp"

        android:text="Phone Call" />

</LinearLayout>

3.Colors adding Strings.xml:

    <color name="Background">#7B68EE</color>

4.Add permission on manifest.xml:

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