本文主要是介绍Android开发中创建自定义Dialog的方法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
Android开发中创建自定义Dialog的关键只有两个步骤：1.创建一个需要在自定义Dialog显示的自定义View，创建这个自定义View时，既可以在这个View的构造方法中用Android开发自带的控件把自定义View构造出来;也可以在自定义View的@Override protected void onDraw(Canvas canvas)方法中，把自定义View绘制出来
2.在自定义Dialog的@Override protected void onCreate(Bundle savedInstanceState)方法中，通过setContentView(自定义View);方法，把我们的自定义View显示出来
在创建好自定义Dialog后，我们在别的类中，只要调用自定义Dialog的构造函数就可以把自定义Dialog显示出来。对于ColorPickerDialog这个类，调用语句如下：new ColorPickerDialog(getContext(), listener, mPaint.getColor()).show();
下面提供一个Android开发在自定义View的构造函数中把View构造出来的例子：
/**
* 文字对话框
*/
public class TextDialog extends Dialog implements SeekBar.OnSeekBarChangeListener{
private LinearLayout linearLayout;
private EditText etForText;
private SeekBar seekBar;
private TextView tvForSeekBar;
private Button btnOk;
private Button btnCancel;
private LinearLayout topChildLinearLayout;
private LinearLayout bottomChildLinearLayout;
private OnTextInputListener mListener;
/**
* 文字对话框标题
*/
private String title = "请输入文字与选择文字大小";
public interface OnTextInputListener {
void textInput(String text, int textSize);
}
public TextDialog(Context context, OnTextInputListener listener)
{
super(context);
mListener = listener;
linearLayout = new LinearLayout(getContext());
linearLayout.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setGravity(Gravity.CENTER);
etForText = new EditText(context);
etForText.setMinLines(5);//设置最大行数
seekBar = new SeekBar(context);
seekBar.setLayoutParams(new LinearLayout.LayoutParams(200, LayoutParams.FILL_PARENT));
seekBar.setMax(100);
seekBar.setProgress(50);
seekBar.setOnSeekBarChangeListener(this);
tvForSeekBar = new TextView(context);
tvForSeekBar.setText("50");
btnOk = new Button(getContext());
btnOk.setText("确定");
btnCancel = new Button(getContext());
btnCancel.setText("取消");
linearLayout.addView(etForText);
topChildLinearLayout = new LinearLayout(getContext());
topChildLinearLayout.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
topChildLinearLayout.setOrientation(LinearLayout.HORIZONTAL);
topChildLinearLayout.addView(seekBar);
topChildLinearLayout.addView(tvForSeekBar);
linearLayout.addView(topChildLinearLayout);
bottomChildLinearLayout = new LinearLayout(getContext());
bottomChildLinearLayout.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
bottomChildLinearLayout.setOrientation(LinearLayout.HORIZONTAL);
bottomChildLinearLayout.setGravity(Gravity.CENTER);
bottomChildLinearLayout.addView(btnOk);
bottomChildLinearLayout.addView(btnCancel);
linearLayout.addView(bottomChildLinearLayout);
btnOk.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
//验证text是否为空
String text = etForText.getText().toString()/*.replace("\n", "")*/;
if(text == null || text.trim().equals(""))
{
Toast.makeText(getContext(), "文字不能为空", Toast.LENGTH_SHORT).show();
return;
}
int textSizeInt = Integer.valueOf(tvForSeekBar.getText().toString());
mListener.textInput(text, textSizeInt);
dismissDialog();
}
});
btnCancel.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
dismissDialog();
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(linearLayout);
setTitle(title);
}
public void dismissDialog()
{
this.dismiss();
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
{
// TODO Auto-generated method stub
tvForSeekBar.setText(progress + "");
}
@Override
public void onStartTrackingTouch(SeekBar seekBar
{
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar)
{
// TODO Auto-generated method stub
}
}
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