ProgressDialog

Исходники и картинки для статьи Android::Диалоговое окно ProgressDialog

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:id="@+id/buttonShowProgress"
		android:text="@string/showprogress"></Button>
	<Button
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:id="@+id/buttonShowWheelDialog"
		android:text="@string/showwheeldialog"></Button>
	<Button
		android:layout_width="match_parent"
		android:layout_height="wrap_content"
		android:id="@+id/buttonThreadProgress"
		android:text="@string/showprogressinthread"></Button>
</LinearLayout>

strings.xml

<resources>
	<string
		name="hello">Hello World, ProgressDialogDemoActivity!</string>
	<string
		name="app_name">ProgressDialogDemo</string>
	<string
		name="showprogress">Запустить горизонтальный индикатор прогресса</string>
	<string
		name="showwheeldialog">Показать круговой индикатор прогресса</string>
	<string
		name="showprogressinthread">Индикатор прогресса в другом потоке</string>
</resources>

ProgressDialogDemoActivity.java

package ru.alexanderklimov.progressdialogdemo;

import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ProgressDialogDemoActivity extends Activity 
{
	
	static final int IDD__HORIZONTAL_PROGRESS = 0;
	static final int IDD_WHEEL_PROGRESS = 1;
	static final int IDD_THREAD_PROGRESS = 2;
	
	private ProgressDialog mProgressDialog;
	private ProgressThread progressThread;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        final Button mButton = (Button)findViewById(R.id.buttonShowProgress);
        final Button ButtonWheelProgress = (Button)findViewById(R.id.buttonShowWheelDialog);
        final Button ButtonThreadProgress = (Button)findViewById(R.id.buttonThreadProgress);
        
        mButton.setOnClickListener(new OnClickListener() 
        {
 		    @Override
		    public void onClick(View view) 
 		    {
			    // TODO Auto-generated method stub
			    showDialog(IDD__HORIZONTAL_PROGRESS);
		    }
	    });
       
       ButtonWheelProgress.setOnClickListener(new OnClickListener() 
       {
		    @Override
		    public void onClick(View view) 
		    {
 			    showDialog(IDD_WHEEL_PROGRESS);
		    }
	   });
       
       ButtonThreadProgress.setOnClickListener(new OnClickListener() 
       {
		    @Override
		    public void onClick(View arg0) 
		    {
			    showDialog(IDD_THREAD_PROGRESS);
		    }
	    });
    }
    
    protected Dialog onCreateDialog(int id)
    {
		switch (id) 
		{
		    case IDD__HORIZONTAL_PROGRESS:
			    mProgressDialog = new ProgressDialog(
					ProgressDialogDemoActivity.this);
			    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
			    mProgressDialog.setMessage("Загружаю. Подождите...");
			    return mProgressDialog;

		    case IDD_WHEEL_PROGRESS:
			    mProgressDialog = new ProgressDialog(
					ProgressDialogDemoActivity.this);
			    mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
			    mProgressDialog.setMessage("Загружаю. Подождите...");
			    return mProgressDialog;
		    case IDD_THREAD_PROGRESS:
		    	mProgressDialog = new ProgressDialog(
		    		ProgressDialogDemoActivity.this);
	            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
	            mProgressDialog.setMessage("Загружаю. Подождите...");
	            return mProgressDialog;

		default:
			return null;
		}
    }
    
    @Override
    protected void onPrepareDialog(int id, Dialog dialog) 
    {
        switch(id) 
        {
            case IDD_THREAD_PROGRESS:
                mProgressDialog.setProgress(0);
                progressThread = new ProgressThread(handler);
                progressThread.start();
        }
    }

    // Define the Handler that receives messages from the thread and update the progress
    final Handler handler = new Handler() {
        public void handleMessage(Message msg) {
            int total = msg.arg1;
            mProgressDialog.setProgress(total);
            if (total >= 100){
                dismissDialog(IDD_THREAD_PROGRESS);
                progressThread.setState(ProgressThread.STATE_DONE);
            }
        }
    };

    /** Nested class that performs progress calculations (counting) */
    private class ProgressThread extends Thread {
        Handler mHandler;
        final static int STATE_DONE = 0;
        final static int STATE_RUNNING = 1;
        int mState;
        int total;
       
        ProgressThread(Handler h) {
            mHandler = h;
        }
       
        public void run() {
            mState = STATE_RUNNING;   
            total = 0;
            while (mState == STATE_RUNNING) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    Log.e("ERROR", "Thread Interrupted");
                }
                Message msg = mHandler.obtainMessage();
                msg.arg1 = total;
                mHandler.sendMessage(msg);
                total++;
            }
        }
        
        /* sets the current state for the thread,
         * used to stop the thread */
        public void setState(int state) {
            mState = state;
        }
    } // onCreate
} // class

Рисунки