Android Examples

Thursday, 14 March 2013

How to Read PDF files in Android?

Read PDF Files from Sdcard in Android

First Create one Android Project in Eclipse after that download PDFViewer.jar file from Internet and then add into project's build path.

After Create one Activity in this Project, Name is Second.java

Second.java

public class Second extends PdfViewerActivity {

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}

public int getPreviousPageImageResource() {
return R.drawable.left_arrow;
}

public int getNextPageImageResource() {
return R.drawable.right_arrow;
}

public int getZoomInImageResource() {
return R.drawable.zoom_in;
}

public int getZoomOutImageResource() {
return R.drawable.zoom_out;
}

public int getPdfPasswordLayoutResource() {
return R.layout.pdf_file_password;
}

public int getPdfPageNumberResource() {
return R.layout.dialog_pagenumber;
}

public int getPdfPasswordEditField() {
return R.id.etPassword;
}

public int getPdfPasswordOkButton() {
return R.id.btOK;
}

public int getPdfPasswordExitButton() {
return R.id.btExit;
}

public int getPdfPageNumberEditField() {
return R.id.pagenum_edit;
}
}

After that Add below code into your project's main activity and change extends Activity to ListActivity in your java file.

First.java

public class First extends ListActivity {

String[] pdflist;
File[] imagelist;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);

File images = Environment.getExternalStorageDirectory();
imagelist = images.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return ((name.endsWith(".pdf")));
}
});
pdflist = new String[imagelist.length];
for (int i = 0; i < imagelist.length; i++) {
pdflist[i] = imagelist[i].getName();
}
this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, pdflist));
}

protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
String path = imagelist[(int) id].getAbsolutePath();
openPdfIntent(path);
}

private void openPdfIntent(String path) {
try {
final Intent intent = new Intent(First.this, Second.class);
intent.putExtra(PdfViewerActivity.EXTRA_PDFFILENAME, path);
startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
}
}
}

And Don't Forget to Add Second Activity in Android Manifest file.

Enjoy :--)

Monday, 7 January 2013

Custom Toast in Android

First Create New Android Project and after that add below xml file in res/layout folder and add below code into your MainActivity.java file.

toast.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/toast_layout_root"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:padding="10dp"
  android:background="#ffffff" >

  <ImageView android:id="@+id/image"
  android:layout_width="wrap_content"
  android:layout_height="fill_parent"
  android:layout_marginRight="10dp" />

  <TextView android:id="@+id/text"
  android:layout_width="wrap_content"
  android:layout_height="fill_parent"
  android:textColor="#FFF" />

</LinearLayout>

Add below code into your MainActivity.java file

MainActivity.java

LayoutInflater inflater = getLayoutInflater();

View layout = inflater.inflate(R.layout.toast_layout, (ViewGroup) findViewById(R.id.toast_layout_root));

ImageView image = (ImageView) layout.findViewById(R.id.image);
image.setImageResource(R.drawable.android);
TextView text = (TextView) layout.findViewById(R.id.text);
text.setText("Hello! This is a custom toast!");

Toast toast = new Toast(getApplicationContext());
toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
toast.setDuration(Toast.LENGTH_LONG);
toast.setView(layout);
toast.show();

Enjoy :-)

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How To Send Email In Android

Write below code into your activity file for send Email from Android Application.

Java Code:-

Intent mAndroidEmailIntent = new Intent (android.content.Intent.ACTION_SEND);
String aEmailList[] = { "android@gmail.com","android@yahoomail.com" };
mAndroidEmailIntent.putExtra (android.content.Intent.EXTRA_EMAIL, aEmailList);
mAndroidEmailIntent.putExtra (android.content.Intent.EXTRA_SUBJECT, "Mail Subject");
mAndroidEmailIntent.setType ("plain/text");
mAndroidEmailIntent.putExtra (android.content.Intent.EXTRA_TEXT, "Email From My Android App");
startActivity (mAndroidEmailIntent);

Enjoy :-)

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Saturday, 24 November 2012

Android Development – Customize Android Fonts

First Create New Android Project and after that add "DroidSansFallback.ttf" file into assets folder.

After that put below code into activity_main.xml file and MainActivity.java file

activity_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:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Dipak Keshariya"
android:id="@+id/TextView1" />

</LinearLayout>

MainActivity.java

public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

// text view label
TextView mTextView1 = (TextView) findViewById(R.id.TextView1);

// Loading Font Face
Typeface tf = Typeface.createFromAsset(getAssets(), "DroidSansFallback.ttf");

// Applying font
mTextView1.setTypeface(tf);
}
}

Download Full Source Code from below link.

Customize Android Fonts

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Monday, 27 August 2012

Multiple Android Activities in a TabActivity

Project Name:- Tab_Sample
Package Name:- com.android.tabsample
Target SDK:- Android 2.2 (API 8)

Create below 5 classes under the "com.android.tabsample" package.

ActivityStack.java

public class ActivityStackHome extends ActivityGroup {
private Stack<String> stack;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (stack == null)
stack = new Stack<String>();
// start default activity
push("FirstStackActivity", new Intent(this, Tab_SampleActivity.class));
}

@Override
public void finishFromChild(Activity child) {
pop();
}

@Override
public void onBackPressed() {
pop();
}

public void push(String id, Intent intent) {
Window window = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
if (window != null) {
stack.push(id);
setContentView(window.getDecorView());
}
}

public void pop() {
if (stack.size() == 1)
finish();
LocalActivityManager manager = getLocalActivityManager();
manager.destroyActivity(stack.pop(), true);
if (stack.size() > 0) {
Intent lastIntent = manager.getActivity(stack.peek()).getIntent();
Window newWindow = manager.startActivity(stack.peek(), lastIntent);
setContentView(newWindow.getDecorView());
}
}
}

TabActivity.java

public class TabActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tab_screen);
TabHost tabHost = getTabHost();
Intent intent = new Intent().setClass(this, ActivityStack.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.home));
spec.setContent(intent);

tabHost.addTab(spec);

Intent intent1 = new Intent().setClass(this, ActivityStack.class);
TabHost.TabSpec spec1 = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.invoice));
spec1.setContent(intent1);
tabHost.addTab(spec1);

tabHost.setCurrentTab(0);
}
}

FirstActivity.java

public class FirstActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView = new TextView(this);
textView.setText("Tab Sample Activity ");
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(getParent(), SecondActivity.class);
ActivityStack activityStack = (ActivityStack) getParent();
activityStack.push("SecondActivity", intent);
}
});

setContentView(textView);
}
}

SecondActivity.java

public class SecondActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TextView textView = new TextView(this);
textView.setText("First Stack Activity ");
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(getParent(), ThirdActivity.class);
ActivityStack activityStack = (ActivityStack) getParent();
activityStack.push("ThirdActivity", intent);
}
});

setContentView(textView);
}
}

ThirdActivity.java

public class ThirdActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.main);
}
}

Add Below XML files into your res/layout folder.

1) tab_screen.xml

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

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

android:id="@android:id/tabhost"

android:layout_width="fill_parent"

android:layout_height="fill_parent" >

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical"

android:padding="3dp" >

<FrameLayout

android:id="@android:id/tabcontent"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:layout_above="@android:id/tabs"

android:layout_weight="1" />

<TabWidget

android:id="@android:id/tabs"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true" />

</RelativeLayout>

</TabHost>

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:orientation="vertical" >

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello" />

</LinearLayout>

AndroidManifest.xml:-

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

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

package="com.android.tabsample"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk android:minSdkVersion="8" />

<application

android:icon="@drawable/ic_launcher"