[Android]_ch2.7_SeekBar元件介紹

[Android]_ch2.7_SeekBar元件介紹

package com.derek.ch4_seekbar;



import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.LinearLayout;

import android.widget.SeekBar;

import android.widget.SeekBar.OnSeekBarChangeListener;

import android.widget.TextView;

import android.widget.Toast;





public class MainActivity extends Activity {

LinearLayout layout;

TextView tv1;

SeekBar sb1;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        sb1=(SeekBar)findViewById(R.id.seekBar1);

        tv1=(TextView)findViewById(R.id.textView1);

        layout=(LinearLayout)findViewById(R.id.LinearLayout1);

       

        sb1.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {

@Override

public void onStopTrackingTouch(SeekBar seekBar) {

Toast.makeText(MainActivity.this, "3.放開滑桿，值="+seekBar.getProgress(), Toast.LENGTH_SHORT).show();

}



@Override

public void onStartTrackingTouch(SeekBar seekBar) {

Toast.makeText(MainActivity.this, "1.按下滑桿，值="+seekBar.getProgress(), Toast.LENGTH_SHORT).show();

}



@Override

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

tv1.setText("2.調整滑桿，值="+progress+" formUser="+fromUser);

layout.setBackgroundColor(new Color().rgb(progress, progress, progress));

}

});

    }

}