android之seekBar

效果：

 

layout中的xml文件：

 

<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:id="@+id/myTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="當前進度：" />

    <SeekBar
        android:id="@+id/mySeekBar"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:max="100"
        android:progress="30"
        />
</LinearLayout>

Activaty.java文件：

 

package com.cheng.seekbarproject;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.SeekBar;
import android.widget.Toast;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class SeekBarActivity extends Activity {
    //定義組件
    private TextView mTextView;
    private SeekBar mSeekBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        super.setContentView(R.layout.main);
        //獲得組件
        mTextView = (TextView)findViewById(R.id.myTextView);
        mSeekBar = (SeekBar)findViewById(R.id.mySeekBar);


        //設置進度條的監聽器
        OnSeekBarChangeListener osbcl = new OnSeekBarChangeListener() {

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                //當鼠標擡起的時候觸發遲事件
                Toast.makeText(getApplicationContext(), "onStopTrackingTouch", Toast.LENGTH_LONG).show();
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO Auto-generated method stub
                //當鼠標點擊下的時候觸發該事件
                Toast.makeText(getApplicationContext(), "onStartTrackingTouch", Toast.LENGTH_LONG).show();
            }

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser) {
                // TODO Auto-generated method stub
                //當進度條的值發生改變的時候觸發
                mTextView.setText("當前進度：" + progress);
                Toast.makeText(getApplicationContext(), "當前進度：" + progress + "%", Toast.LENGTH_LONG).show();
            }
        };
        //綁定監聽
        mSeekBar.setOnSeekBarChangeListener(osbcl);


    }

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

}