进度条和调色板

来源：互联网发布：黄一琳网络直播的看法编辑：程序博客网时间：2024/06/05 05:09

首先是新建一个项目color。

然后在Layout下的xxActivity中布局，我的是MainActivity：

代码如下，我的布局有点儿奇葩，刚学，不怎么懂：

这个是必须的，拷贝到values下

然后就是src下的源码

代码入下：

package com.example.color;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.SeekBar;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener,SeekBar.OnSeekBarChangeListener{
private Button button1,button2,button3;
private ProgressBar progress_bar1,progress_bar2,progress_bar3;

static int r = 0,g = 0 ,b = 0;//定义三个静态变量
private View view1; //声明view对象
private SeekBar seekbar1,seekbar2,seekbar3; //声明三个seekbar对象，进度条
private TextView textview1,textview2,textview3;//右边的文本框
private View view;//最下面一个填充色框

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1=(Button) findViewById(R.id.button1);
button2=(Button) findViewById(R.id.button2);
button3=(Button) findViewById(R.id.button3);
progress_bar1=(ProgressBar) findViewById(R.id.progress_bar1);
progress_bar2=(ProgressBar) findViewById(R.id.progress_bar2);
progress_bar3=(ProgressBar) findViewById(R.id.progress_bar3);
button1.setOnClickListener(this);
button2.setOnClickListener(this);
button3.setOnClickListener(this);
progress_bar1.setOnClickListener(this);
progress_bar2.setOnClickListener(this);
progress_bar3.setOnClickListener(this);

view1 = (View)findViewById(R.id.view);//得到View对象
view1.setBackgroundColor(Color.rgb(r, g, b));//给view显示背景颜色

seekbar1 = (SeekBar)findViewById(R.id.seek1);//得到三个seekbar对象
seekbar2 = (SeekBar)findViewById(R.id.seek2);
seekbar3 = (SeekBar)findViewById(R.id.seek3);
textview1=(TextView) findViewById(R.id.textview1); //获取textview对象
textview2=(TextView) findViewById(R.id.textview2);
textview3=(TextView) findViewById(R.id.textview3);
view=(View) findViewById(R.id.view);//获取view对象

seekbar1.setOnSeekBarChangeListener(this);//分别对三个seek绑定监听器
seekbar2.setOnSeekBarChangeListener(this);
seekbar3.setOnSeekBarChangeListener(this);
}
public void onClick(View v){
switch(v.getId()){
case R.id.button1:
int progress1=progress_bar1.getProgress();
progress1=progress1+10;
progress_bar1.setProgress(progress1);
break;

case R.id.button2:
int progress2=progress_bar2.getProgress();
progress2=progress2+10;
progress_bar2.setProgress(progress2);
break;
case R.id.button3:
int progress3=progress_bar3.getProgress();
progress3=progress3+10;//每点击一次加10
progress_bar3.setProgress(progress3);
break;
}
}
//seekbar拖动时实现这个方法
public void onProgressChanged(SeekBar seekbar,int arg1, boolean arg2){
switch(seekbar.getId()){
case R.id.seek1:
r= seekbar1.getProgress();//获取进度
textview1.setText(r+"");//给textview1设置值
view.setBackgroundColor(Color.rgb(r, g, b));//设置view背景色
break;
case R.id.seek2:
g= seekbar2.getProgress();
textview2.setText(g+"");
view.setBackgroundColor(Color.rgb(r, g, b));
break;
case R.id.seek3:
b= seekbar3.getProgress();
textview3.setText(b+"");
view.setBackgroundColor(Color.rgb(r, g, b));
break;
}
}

public void onStartTrackingTouch (SeekBar seekbar){
}
//停止拖动
public void onStopTrackingTouch (SeekBar seekbar){
}
@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;
}

}

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