安卓app_sl4_3拖动条示范代码

安卓app_sl4_3拖动条示范代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.sl4_3.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <SeekBar
        android:id="@+id/seekBar1"
        android:max="100"
        android:progress="50"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="52dp" />

</RelativeLayout>

package com.example.sl4_3;

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

public class MainActivity extends Activity {

    private SeekBar seekBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView result=(TextView) findViewById(R.id.textView1);
        seekBar=(SeekBar)findViewById(R.id.seekBar1);
        seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener(){

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                // TODO 自动生成的方法存根
                result.setText("当前值："+progress);
                
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
                // TODO 自动生成的方法存根
                Toast.makeText(MainActivity.this, "开始滑动", Toast.LENGTH_SHORT).show();
                
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                // TODO 自动生成的方法存根
                Toast.makeText(MainActivity.this, "结束滑动", Toast.LENGTH_SHORT).show();
                
            }
            
        });
    }

    @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;
    }

    @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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}