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What does android:layout_weight mean?

I don't understand how to use this attribute. Can anyone tell me more about it?

Set ImageView width and height programmatically?

How can I set an ImageView's width and height programmatically?

Handling click events on a drawable within an EditText

I have added an image right of the text in an EditText widget, using the following XML:

<EditText
  android:id="@+id/txtsearch"
  ...
  android:layout_gravity="center_vertical"
  android:background="@layout/shape"
  android:hint="Enter place,city,state"
  android:drawableRight="@drawable/cross" />

But I want to clear the EditText when the embedded image is clicked. How can I do this?

how to add multiple widgets in one app?

I've just finished my Android widget. Now I need to have different sizes of this wiget for the user to choose from. for example I need a medium, small and large size widget. so when the user install the app and hold the the home screen then choose widget, in the widget menu I want him to see three widget with the same app name but with the size. something like this:

helloSmall helloMedium helloLarge

I have the medium one ready but how can I make the small and the large in the same app? knowing that all three sizes contain the same exact data and actions just the size and the background are different.

Thanks.

Assign width to half available screen width declaratively

Is it possible to assign a widget width to half the available screen width, and do it using declarative xml?

Example of using Android tabs with Views instead of Activities?

The Android Developers TabWidget tutorial says the following:

"You can implement your tab content in one of two ways: use the tabs to swap Views within the same Activity, or use the tabs to change between entirely separate activities."

The tutorial goes on to demonstrate how you can use tabs with separate Activities. I have been unable to find an example of using tabs with different Views within the same Activity. I would rather not re-invent this particular wheel, so I am hoping someone here knows how this is done and can clue me in. Thanks!

Use external fonts in android

i want to use external fonts in my app. i have tried adding new fonts using asset managers but it did not work.

Typeface face;

face = Typeface.createFromAsset(getAssets(), "font.otf");

textview.setTypeface(face);

but it did not show the text...

plz help..

Android - Set focus to a button widget programmatically onCreate of the activity

Is it possible to set a focus to a button widget which lies somewhere down in my layout. onCreate of the activity my control/focus should be on that button programmatically.

Android EditText Transparent Background

I want to have a transparent background for Android EditText widget. How is that possible?

Android - Is It possible to disable the click of home button

I have an application, when it launches I have to disable all the buttons on Android device, I succeeded in disabling end call and others. I need to disable home button click. It should not produce any action on click.

Any suggestions highly appreciated

How to show one layout on top of the other programmatically in my case?

My main layout main.xml simply contains two LinearLayouts:

• The 1st LinearLayout hosts a VideoView and a Button,
• The 2nd LinearLayout hosts an EditText, and this LinearLayout has set the visibility value to "GONE" (android:visibility="gone")

like below:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    
    android:layout_height="fill_parent" 
    android:layout_width="fill_parent"
        android:orientation="vertical"
>
    <LinearLayout 
        android:id="@+id/first_ll"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"

    >
        <VideoView 
            android:id="@+id/my_video"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="9"
        />

        <Button
            android:id="@+id/my_btn"
            android:layout_width="30dip" 
            android:layout_height="30dip"
            android:layout_gravity="right|bottom"
                android:layout_weight="1"
        />

    </LinearLayout>

    <LinearLayout 
        android:id="@+id/second_ll"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="2dip"

        android:visibility="gone"
    >
        <EditText 
            android:id="@+id/edit_text_field"
            android:layout_height="40dip"
            android:layout_width="fill_parent"
            android:layout_weight="5"
            android:layout_gravity="center_vertical"
        />

    </LinearLayout>
</LinearLayout>

I successfully implemented the feature that when the Button (with id my_btn) is pressed, the 2nd LinearLayout with EditText field is shown, with the following Java code:

LinearLayout secondLL = (LinearLayout) findViewById(R.id.second_ll);

Button myBtn = (Button) findViewById(R.id.my_btn);
myBtn.setOnClickListener(new OnClickListener(){
    @Override
    public void onClick(View v){
        int visibility = secondLL.getVisibility();

        if(visibility==View.GONE)
            secondLL.setVisibility(View.VISIBLE);

    }
}); 

With the above Java code, the 2nd LinearLayout with EditText is shown like appending below the 1st LinearLayout which makes sense.

BUT, What I need is: when Button(id: my_btn) is pressed, the 2nd LinearLayout with EditText is shown on top of the 1st LinearLayout, which looks like the 2nd LinearLayout with EditText is rising from the bottom of screen, and the 2nd LinearLayout with EditText only occupy part of the screen from bottom, that's the 1st LinearLayout still visible, like the image below showed:

So, when Button(id: my_btn) is pressed how to show the 2nd LinearLayout with EditText on top of the 1st LinearLayout instead of appending 2nd LinearLayout below 1st LinearLayout programmatically?

Open source Android libraries? Reusable Views, ViewGroups, Adapters etc? [closed]

Here's what I really want: a site collecting re-usable components for Android.

I have found various small lists, the biggest being the Open Intents library list. Mark Murphy (hi, Mark) also lists the library projects he publishes.

None of this is of the same order as, say Cocoa Controls or Cocoa Objects.

Where do you go to grab re-usable libraries for Android?

Edit: this isn't just about library projects, though this would be ideal. On the flip side: where do I publish my open-sourced library projects, over and above just "Github".

How to start a Service when .apk is Installed for the first time

In my Application I am not having any UI part, so I need to start a Service as soon as the Applicaton gets installed on the Device. I saw many links from which the answer was that its not possible but I guess it is surely possible. Just have a look at PlanB Application on the Android Market that does fulfil my requirement. Below is my Manifest file how I tried, but the Service was not called at all. So, let me know what is the best possible way to start a Service when the Application gets Installed.

UPDATE

I also tried using android.intent.action.PACKAGE_ADDED it works fine for detecting the Package for the other Applications but not for itself.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.auto.start"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

    <application
        android:icon="@drawable/ic_launcher" >

        <service android:name=".MyService">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </service>

        <receiver android:name=".BootUpReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED"/>
                <category android:name="android.intent.category.DEFAULT"/>
                <action android:name="android.intent.action.PACKAGE_INSTALL" />
                <action android:name="android.intent.action.PACKAGE_ADDED" />
                <data android:scheme="package"/>
            </intent-filter>
        </receiver>
    </application>
</manifest>

how to get html content from a webview?

Which is the simplest method to get html code from a webview? I have tried several methods from stackoverflow and google, but can't find an exact method. Please mention an exact way.

public class htmldecoder extends Activity implements OnClickListener,TextWatcher
{
TextView txturl;
Button btgo;
WebView wvbrowser;
TextView txtcode;
ImageButton btcode;
LinearLayout llayout;
int flagbtcode;
public void onCreate(Bundle savedInstanceState)
{
            super.onCreate(savedInstanceState);
                setContentView(R.layout.htmldecoder);

    txturl=(TextView)findViewById(R.id.txturl);

    btgo=(Button)findViewById(R.id.btgo);
    btgo.setOnClickListener(this);

    wvbrowser=(WebView)findViewById(R.id.wvbrowser);
    wvbrowser.setWebViewClient(new HelloWebViewClient());
    wvbrowser.getSettings().setJavaScriptEnabled(true);
    wvbrowser.getSettings().setPluginsEnabled(true);
    wvbrowser.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
    wvbrowser.addJavascriptInterface(new MyJavaScriptInterface(),"HTMLOUT");
    //wvbrowser.loadUrl("http://www.google.com");
    wvbrowser.loadUrl("javascript:window.HTMLOUT.showHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");


    txtcode=(TextView)findViewById(R.id.txtcode);
    txtcode.addTextChangedListener(this);

    btcode=(ImageButton)findViewById(R.id.btcode);
    btcode.setOnClickListener(this);

    }

public void onClick(View v)
{
    if(btgo==v)
    {
        String url=txturl.getText().toString();
        if(!txturl.getText().toString().contains("http://"))
        {
            url="http://"+url;
        }
        wvbrowser.loadUrl(url);
        //wvbrowser.loadData("<html><head></head><body><div style='width:100px;height:100px;border:1px red solid;'></div></body></html>","text/html","utf-8");
    }
    else if(btcode==v)
    {
        ViewGroup.LayoutParams params1=wvbrowser.getLayoutParams();
        ViewGroup.LayoutParams params2=txtcode.getLayoutParams();
        if(flagbtcode==1)
        {
            params1.height=200;
            params2.height=220;
            flagbtcode=0;
            //txtcode.setText(wvbrowser.getContentDescription());
        }
        else
        {
            params1.height=420;
            params2.height=0;
            flagbtcode=1;
        }
        wvbrowser.setLayoutParams(params1);
        txtcode.setLayoutParams(params2);

    }
}

public class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {

        view.loadUrl(url);
        return true;
    }
    /*@Override
    public void onPageFinished(WebView view, String url)
    {
        // This call inject JavaScript into the page which just finished loading. 
        wvbrowser.loadUrl("javascript:window.HTMLOUT.processHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
    }*/

}
class MyJavaScriptInterface
{
    @SuppressWarnings("unused")
    public void showHTML(String html)
    {

        txtcode.setText(html);
    }
}

public void afterTextChanged(Editable s) {
    // TODO Auto-generated method stub

}

public void beforeTextChanged(CharSequence s, int start, int count,
        int after) {
    // TODO Auto-generated method stub

}

public void onTextChanged(CharSequence s, int start, int before, int count) {
    wvbrowser.loadData("<html><div"+txtcode.getText().toString()+"></div></html>","text/html","utf-8");

}

}

How to force ViewPager to re-instantiate its items [duplicate]

I am using ViewPager to allow user to swipe between its views. Is there a way how to force this ViewPager to reload/re-instantiate its views in case that they are no longer valid or needs to be refreshed? I tried to call notifyDataSetChanged() on its adapter but this does not invoke instantiateItem() method again.

EDIT

Here is the class that extends from ViewPager and its adapter definision. Bellow is the refresh() method that I call when I want to force to refresh items.

public class DayFlipper extends ViewPager {

public class FlipperAdapter extends PagerAdapter {

    @Override
    public int getCount() {
        return DayFlipper.DAY_HISTORY;
    }

    @Override
    public void startUpdate(View container) {
    }

    @Override
    public Object instantiateItem(View container, int position) {
        Log.d(TAG, "instantiateItem(): " + position);

        Date d = DateHelper.getBot();
        for (int i = 0; i < position; i++) {
            d = DateHelper.getTomorrow(d);
        }

        d = DateHelper.normalize(d);

        CubbiesView cv = new CubbiesView(mContext);
        cv.setLifeDate(d);
        ((ViewPager) container).addView(cv, 0);
        // add map
        cv.setCubbieMap(mMap);
        cv.initEntries(d);
        return cv;
    }

    @Override
    public void destroyItem(View container, int position, Object object) {
        ((ViewPager) container).removeView((CubbiesView) object);
    }

    @Override
    public void finishUpdate(View container) {

    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == ((CubbiesView) object);
    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    @Override
    public void restoreState(Parcelable state, ClassLoader loader) {

    }

}

    ...

    public void refresh() {
    getAdapter().notifyDataSetChanged();
}
}