[英]Set 3 seekbars to change RGB channels
我正在跟蹤編寫此代碼的代碼,該代碼根據分配給3個不同搜索框的RGB通道來更改背景色,因此R代表一個sk,G代表另一個sk,B代表另一個。
問題是我無法使代碼正常工作:
private int seekR, seekG, seekB;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_color_changer);
SeekBar sbR = (SeekBar) findViewById(R.id.RedSeekBar);
SeekBar sbG = (SeekBar) findViewById(R.id.GreenSeekBar);
SeekBar sbB = (SeekBar) findViewById(R.id.BlueSeekBar);
mySeekBarChangeListener msbclR = new mySeekBarChangeListener();
mySeekBarChangeListener msbclG = new mySeekBarChangeListener();
mySeekBarChangeListener msbclB = new mySeekBarChangeListener();
sbR.setonseekBarChangeListener(msbclR);
sbG.setonseekBarChangeListener(msbclG);
sbB.setonseekBarChangeListener(msbclB);
msbclR.onprogressChanged(sbR, sbR.getProgress(), false);
msbclG.onprogressChanged(sbG, sbG.getProgress(), false);
msbclB.onprogressChanged(sbB, sbB.getProgress(), false);
}
這段文字幾乎在所有地方給我一個錯誤,無論如何,似乎什么都沒有。 我只想知道為什么。.我是否必須基於mySeekBarChangeListener進行設置? 提前致謝!
它應該工作:
private int seekR, seekG, seekB;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_color_changer);
SeekBar sbR = (SeekBar) findViewById(R.id.RedSeekBar);
SeekBar sbG = (SeekBar) findViewById(R.id.GreenSeekBar);
SeekBar sbB = (SeekBar) findViewById(R.id.BlueSeekBar);
sbR.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
seekR = progress;
doSomethingWithColor();
}
});
sbG.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
seekG = progress;
doSomethingWithColor();
}
});
sbB.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
seekB = progress;
doSomethingWithColor();
}
});
}
private void doSomethingWithColor() {
int color = Color.rgb(seekR, seekG, seekB);
// Do something with color
}
或更緊湊
private int seekR, seekG, seekB;
private SeekBar.OnSeekBarChangeListener onSeekBarChangeListener = new SeekBar.OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
switch (seekBar.getId()) {
case R.id.RedSeekBar:
seekR = progress;
break;
case R.id.GreenSeekBar:
seekG = progress;
break;
case R.id.BlueSeekBar:
seekB = progress;
break;
}
doSomethingWithColor();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_color_changer);
SeekBar sbR = (SeekBar) findViewById(R.id.RedSeekBar);
SeekBar sbG = (SeekBar) findViewById(R.id.GreenSeekBar);
SeekBar sbB = (SeekBar) findViewById(R.id.BlueSeekBar);
sbR.setOnSeekBarChangeListener(onSeekBarChangeListener);
sbG.setOnSeekBarChangeListener(onSeekBarChangeListener);
sbB.setOnSeekBarChangeListener(onSeekBarChangeListener);
}
private void doSomethingWithColor() {
int color = Color.rgb(seekR, seekG, seekB);
// Do something with color
}
另一個
private int seekR, seekG, seekB;
public class MySeekBarChangeListener implements SeekBar.OnSeekBarChangeListener {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
switch (seekBar.getId()) {
case R.id.RedSeekBar:
seekR = progress;
break;
case R.id.GreenSeekBar:
seekG = progress;
break;
case R.id.BlueSeekBar:
seekB = progress;
break;
}
doSomethingWithColor();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_color_changer);
SeekBar sbR = (SeekBar) findViewById(R.id.RedSeekBar);
SeekBar sbG = (SeekBar) findViewById(R.id.GreenSeekBar);
SeekBar sbB = (SeekBar) findViewById(R.id.BlueSeekBar);
MySeekBarChangeListener msbclR = new MySeekBarChangeListener();
MySeekBarChangeListener msbclG = new MySeekBarChangeListener();
MySeekBarChangeListener msbclB = new MySeekBarChangeListener();
sbR.setOnSeekBarChangeListener(msbclR);
sbG.setOnSeekBarChangeListener(msbclG);
sbB.setOnSeekBarChangeListener(msbclB);
}
private void doSomethingWithColor() {
int color = Color.rgb(seekR, seekG, seekB);
// Do something with color
}
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