Category Archives: Android

Open PDF

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How to open PDF in Android?

Open pdf

We have to put the ourexample.pdf in our divice, in this case in Android/data

File file =new File(Environment.getExternalStorageDirectory(),"Android/data/ExampleForm.pdf");

if (file.exists()) {
     Uri path = Uri.fromFile(file);
     Intent intent = new Intent(Intent.ACTION_VIEW);
     intent.setDataAndType(path, "application/pdf");
     intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

     try {
        startActivity(intent);
     }
        catch (ActivityNotFoundException e) {
            Toast.makeText(MainActivity.this,
            "No Application Available to View PDF",
            Toast.LENGTH_SHORT).show();

        }
     }
}

Example in Github

To avoid multiple button click at same time

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Bottleneck

Sometimes user can made bottleneck in your app when user click multiple button click at same time. you can avoid, it’s very easy.

To avoid multiple button clik at same time

The standard way to avoid multiple clicks is to save the last clicked time and avoid the other button clicks within 1 second(or any time span).

public class MainActivity extends Activity implements View.OnClickListener{

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

        buttonRight = (Button) findViewById(R.id.btnRight_activity_main);
        buttonLeft = (Button) findViewById(R.id.btnLeft_activity_main);

        buttonLeft.setOnClickListener(this);
        buttonRight.setOnClickListener(this);
    }

    // variable to track event time
    private long mLastClickTime = 0;

    @Override
    public void onClick(View v) {
        // Preventing multiple clicks, using threshold of 1 second
        if (SystemClock.elapsedRealtime() - mLastClickTime < 1000) {
           return;
        }
        mLastClickTime = SystemClock.elapsedRealtime();
        pressedOnClick(v);
    }

    public void pressedOnClick(View v){
        switch (v.getId()){
            case R.id.btnLeft_activity_main:
                showToast("Left_activity_main");
                break;

            case R.id.btnRight_activity_main:
                showToast("Right_activity_main");
                break;
        }

    }
}

example in github

Video 360

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You can build a application with a video 360.

video 360

You can download the project here

The first step:

We have to put in build.gradle, in dependences this line:

compile files('src/main/libs/panframe-1.9.jar')

Then we have to add video in src/raw

Now in our activity we put this code:

import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.SeekBar;

import com.panframe.android.lib.PFAsset;
import com.panframe.android.lib.PFAssetObserver;
import com.panframe.android.lib.PFAssetStatus;
import com.panframe.android.lib.PFNavigationMode;
import com.panframe.android.lib.PFObjectFactory;
import com.panframe.android.lib.PFView;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends ActionBarActivity implements PFAssetObserver, SeekBar.OnSeekBarChangeListener {

    PFView mPfview;
    PFAsset mPfasset;
    PFNavigationMode mCurrentNavigationMode = PFNavigationMode.MOTION;

    boolean 			mUpdateThumb = true;;
    Timer mScrubberMonitorTimer;

    ViewGroup mFrameContainer;
    Button mStopButton;
    Button				mPlayButton;
    Button				mTouchButton;
    SeekBar				mScrubber;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        mFrameContainer = (ViewGroup) findViewById(R.id.framecontainer);
        mFrameContainer.setBackgroundColor(0xFF000000);

        mPlayButton = (Button)findViewById(R.id.playbutton);
        mStopButton = (Button)findViewById(R.id.stopbutton);
        mTouchButton = (Button)findViewById(R.id.touchbutton);
        mScrubber = (SeekBar)findViewById(R.id.scrubber);

        mPlayButton.setOnClickListener(playListener);
        mStopButton.setOnClickListener(stopListener);
        mTouchButton.setOnClickListener(touchListener);
        mScrubber.setOnSeekBarChangeListener(this);

        mScrubber.setEnabled(false);

        loadVideo("android.resource://" + getPackageName() + "/" + R.raw.skyrim360);

        showControls(true);
        mPfasset.play();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * Show/Hide the playback controls
     *
     * @param  bShow  Show or hide the controls. Pass either true or false.
     */
    public void showControls(boolean bShow)
    {
        int visibility = View.GONE;

        if (bShow)
            visibility = View.VISIBLE;

        mPlayButton.setVisibility(visibility);
        mStopButton.setVisibility(visibility);
        mTouchButton.setVisibility(visibility);
        mScrubber.setVisibility(visibility);

        if (mPfview != null)
        {
            if (!mPfview.supportsNavigationMode(PFNavigationMode.MOTION))
//				_touchButton.setVisibility(View.GONE);
                Log.d("SimplePlayer", "Not supported nav");
        }
    }

    /**
     * Start the video with a local file path
     *
     * @param  filename  The file path on device storage
     */
    public void loadVideo(String filename)
    {

        mPfview = PFObjectFactory.view(MainActivity.this);
        mPfasset = PFObjectFactory.assetFromUri(this, Uri.parse(filename), this);

        mPfview.displayAsset(mPfasset);
        mPfview.setNavigationMode(mCurrentNavigationMode);

        mFrameContainer.addView(mPfview.getView(), 0);

    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        mUpdateThumb = false;
    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        mPfasset.setPLaybackTime(seekBar.getProgress());
        mUpdateThumb = true;
    }

    @Override
    public void onStatusMessage(final PFAsset pfAsset, PFAssetStatus pfAssetStatus) {

        switch (pfAssetStatus)
        {
            case LOADED:
                Log.d("SimplePlayer", "Loaded");
                break;
            case DOWNLOADING:
                Log.d("SimplePlayer", "Downloading 360 movie: "+ mPfasset.getDownloadProgress()+" percent complete");
                break;
            case DOWNLOADED:
                Log.d("SimplePlayer", "Downloaded to "+pfAsset.getUrl());
                break;
            case DOWNLOADCANCELLED:
                Log.d("SimplePlayer", "Download cancelled");
                break;
            case PLAYING:
                Log.d("SimplePlayer", "Playing");
                getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                mScrubber.setEnabled(true);
                mScrubber.setMax((int) pfAsset.getDuration());
                mPlayButton.setText("pause");
                mScrubberMonitorTimer = new Timer();
                final TimerTask task = new TimerTask() {
                    public void run() {
                        if (mUpdateThumb)
                            mScrubber.setProgress((int) pfAsset.getPlaybackTime());
                    }
                };
                mScrubberMonitorTimer.schedule(task, 0, 33);
                break;
            case PAUSED:
                Log.d("SimplePlayer", "Paused");
                mPlayButton.setText("play");
                break;
            case STOPPED:
                Log.d("SimplePlayer", "Stopped");
                mPlayButton.setText("play");
                mScrubberMonitorTimer.cancel();
                mScrubberMonitorTimer = null;
                mScrubber.setProgress(0);
                mScrubber.setEnabled(false);
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                break;
            case COMPLETE:
                Log.d("SimplePlayer", "Complete");
                mPlayButton.setText("play");
                mScrubberMonitorTimer.cancel();
                mScrubberMonitorTimer = null;
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                break;
            case ERROR:
                Log.d("SimplePlayer", "Error");
                break;
        }
    }

    /**
     * Click listener for the play/pause button
     *
     */
    private View.OnClickListener playListener = new View.OnClickListener() {
        public void onClick(View v) {
            if (mPfasset.getStatus() == PFAssetStatus.PLAYING)
            {
                mPfasset.pause();
            }
            else
                mPfasset.play();
        }
    };

    /**
     * Click listener for the stop/back button
     *
     */
    private View.OnClickListener stopListener = new View.OnClickListener() {
        public void onClick(View v) {
            mPfasset.stop();
        }
    };

    /**
     * Click listener for the navigation mode (touch/motion (if available))
     *
     */
    private View.OnClickListener touchListener = new View.OnClickListener() {
        public void onClick(View v) {
//			if (mPfview != null)
//			{

            Button touchButton = (Button)findViewById(R.id.touchbutton);
            if (mCurrentNavigationMode == PFNavigationMode.TOUCH)
            {
                mCurrentNavigationMode = PFNavigationMode.MOTION;
                touchButton.setText("motion");
            }
            else
            {
                mCurrentNavigationMode = PFNavigationMode.TOUCH;
                touchButton.setText("touch");
            }
            mPfview.setNavigationMode(mCurrentNavigationMode);
        }
//		}
    };

    /**
     * Called when pausing the app.
     * This function pauses the playback of the asset when it is playing.
     *
     */
    public void onPause() {
        super.onPause();
        if (mPfasset != null)
        {
            if (mPfasset.getStatus() == PFAssetStatus.PLAYING)
                mPfasset.pause();
        }
    }

    public void  onStartCommand(Intent intent, int flags, int startId) {
        mPfasset.play();
    }

}

You can download the project here

Expandable Listview inside scrollview

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Expandable listview inside scrollview

When we have a ListView expandable inside ScrollView, we must make this in our layout, always expandable listview must be the last view in our layout:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_expandable_scroll_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true">

    <LinearLayout
        android:id="@+id/LinearLayout1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

<!-- your code --->

 <ExpandableListView
            android:id="@+id/activity_expandable_list_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/white"/>

    </LinearLayout>
</ScrollView>

In your onCreate

mListView = (ExpandableListView) findViewById(R.id.activity_expandable_list_view);
        MyExpandableListAdapter adapter = new MyExpandableListAdapter(this,
                mGroups);
        mListView.setAdapter(adapter);
        mListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                                        int groupPosition, long id) {
                setListViewHeight(parent, groupPosition);
                return false;
            }
        });

You need this function:

    private void setListViewHeight(ExpandableListView listView,
                                   int group) {
        ExpandableListAdapter listAdapter = (ExpandableListAdapter) listView.getExpandableListAdapter();
        int totalHeight = 0;
        int desiredWidth = View.MeasureSpec.makeMeasureSpec(listView.getWidth(),
                View.MeasureSpec.EXACTLY);
        for (int i = 0; i < listAdapter.getGroupCount(); i++) {
            View groupItem = listAdapter.getGroupView(i, false, null, listView);
            groupItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

            totalHeight += groupItem.getMeasuredHeight();

            if (((listView.isGroupExpanded(i)) && (i != group))
                    || ((!listView.isGroupExpanded(i)) && (i == group))) {
                for (int j = 0; j < listAdapter.getChildrenCount(i); j++) {
                    View listItem = listAdapter.getChildView(i, j, false, null,
                            listView);
                    listItem.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);

                    totalHeight += listItem.getMeasuredHeight();

                }
            }
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        int height = totalHeight
                + (listView.getDividerHeight() * (listAdapter.getGroupCount() - 1));
        if (height < 10)
            height = 200;
        params.height = height;
        listView.setLayoutParams(params);
        listView.requestLayout();

    }

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ListView inside ScrollView II

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See only one item

You do not have to do anything special in layout.xml file nor handle anything on the parent ScrollView. You only have to handle the child ListView. You can also use this code to use any type of child view inside a ScrollView & perform Touch operations.

ScrollView inside ListView

Just add these lines of code in your java class :

listView.setOnTouchListener(new ListView.OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // Disallow the touch request for parent scroll on touch of child view
                v.getParent().requestDisallowInterceptTouchEvent(true);
                return false;
            }
        });

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