自定义Dialog+OnKeyListener
在FirstActivity中，点击button后，弹出一个输入密码对话框，在CustomDialog 这边实现按键输入，并判断输入的密码是否正确！
问题：怎样让CustomDialog这边无论输入密码正确与否，都要返回一个值给FirstActivity这边，因为FirstActivity这样要根据返回值来判断是否继续执行下面的函数。
CustomDialog.java
public class CustomDialog extends Dialog implements Constants{
private Context mContext;
private int iDoWhat;
private LayoutInflater mInflater;
private View passwordView;
private Dialog passwordDialog;
private int passwordValue;
private StringBuffer strBufferPassword;
private boolean bReturn = false;
private ImageView passNormalImage1;
private ImageView passNormalImage2;
private ImageView passNormalImage3;
private ImageView passNormalImage4;
private dbaseManager dbase;
private BOX_INFO_STRUCT stBoxInfo;
public CustomDialog(Context context)
{
super(context);
this.mContext = context;
this.mInflater = LayoutInflater.from(mContext);
strBufferPassword = new StringBuffer();
setView();
initDialog();
}
private void setView()
{
passwordView = mInflater.inflate(R.layout.input_password_layout, null);
passNormalImage1 = (ImageView) passwordView.findViewById(R.id.pass_normal1_id);
passNormalImage2 = (ImageView) passwordView.findViewById(R.id.pass_normal2_id);
passNormalImage3 = (ImageView) passwordView.findViewById(R.id.pass_normal3_id);
passNormalImage4 = (ImageView) passwordView.findViewById(R.id.pass_normal4_id);
}
private void initDialog()
{
passwordDialog = new Dialog(mContext, R.style.Theme_password);
Window dialogWindow = passwordDialog.getWindow();
dialogWindow.setGravity(Gravity.CENTER_VERTICAL);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
//params.width = LayoutParams.MATCH_PARENT;
//params.height = LayoutParams.MATCH_PARENT;
passwordDialog.setCancelable(true);
passwordDialog.setCanceledOnTouchOutside(false);
passwordDialog.addContentView(passwordView, params);
}
public void show()
{
passwordDialog.show();
passwordDialog.setOnKeyListener(inputPassword);
}
private OnKeyListener inputPassword = new OnKeyListener() {
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event)
{
if (event.getAction() == KeyEvent.ACTION_DOWN)
{
switch (keyCode) {
case KEY_0:
//System.out.println("It's 0");
SetImageAlpha(0);
break;
case KEY_1:
//System.out.println("It's 1");
SetImageAlpha(1);
break;
case KEY_2:
//System.out.println("It's 2");
SetImageAlpha(2);
break;
case KEY_3:
//System.out.println("It's 3");
SetImageAlpha(3);
break;
case KEY_4:
//System.out.println("It's 4");
SetImageAlpha(4);
break;
case KEY_5:
//System.out.println("It's 5");
SetImageAlpha(5);
break;
case KEY_6:
//System.out.println("It's 6");
SetImageAlpha(6);
break;
case KEY_7:
//System.out.println("It's 7");
SetImageAlpha(7);
break;
case KEY_8:
//System.out.println("It's 8");
SetImageAlpha(8);
break;
case KEY_9:
//System.out.println("It's 9");
SetImageAlpha(9);
break;
case KEY_EXIT:
passwordValue = 0;
strBufferPassword.setLength(0);
//System.out.println("Now after Key back the strBufferPassword is " + strBufferPassword);
passwordDialog.dismiss();
return true;
default:
break;
}
}
return false;
}};
private boolean SetImageAlpha(int KeyCode) {
System.out.println("your input number is " + KeyCode);
if(0 <= passwordValue && passwordValue < 4)
{
strBufferPassword.append(String.valueOf(KeyCode));
switch(passwordValue){
case 0:
passNormalImage1.setAlpha(0);
break;
case 1:
passNormalImage2.setAlpha(0);
break;
case 2:
passNormalImage3.setAlpha(0);
break;
case 3:
passNormalImage4.setAlpha(0);
break;
default:
break;
}
if(3 == passwordValue)
{
System.out.println("After input finished : "+strBufferPassword);
if(strBufferPassword.toString().equals("1234"))
{
//bReturn = true;
passwordDialog.dismiss();
System.out.println("Congratulation!Pass!");
return true;
}
else{
bReturn = false;
strBufferPassword.setLength(0);
System.out.println("Now after setLength() the strBufferPassword is " + strBufferPassword);
passwordValue = 0;
passNormalImage1.setAlpha(255);
passNormalImage2.setAlpha(255);
passNormalImage3.setAlpha(255);
passNormalImage4.setAlpha(255);
}
}
else
{
passwordValue ++;
}
}
return false;
}
}
FirstActivity.java:
private Button myBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myBtn = (Button) findViewById(R.id.myBtn_id);
myBtn.setOnClickListener(passwordListner);
}
private OnClickListener passwordListner = new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
customDialog = new CustomDialog(FirstActivity.this);
customDialog.show();
//通过判断返回值，再执行下面函数,问题是怎么让那边输入完密码后，返回一个值
//...
}
};
[解决办法]
一般都是给setPositiveButton加个监听事件,然后直接获取EditText的内容即可.
你可以把CustomDialog设置成内部类,加一个密码输入结束的判断,然后取出密码框的内容,然后调用FirstActivity的其他方法进行密码验证,或者让对话框消失.
[解决办法]
可以添加一个回调的方法，把对话框关闭时要做的事放在里面
[解决办法]
public interface SampleInterface
{
void onFinish(String input);
}
用的时候先在firstactivity中实现这个接口，然后把这个接口传到自定义对话框中，然后给对话框的确认按钮增加点击监听，在监听中调用onFinish。参数input就是你要的返回值。
或者不加接口，用handler也是可以的，广播也行。。。
[解决办法]
可以这样
dialog里定义接口
class dialog extends Dialog implements Constants{
private ResultListener mListener;
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
mListener = (FirstActivity)activity;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Dialog dialog = super.onCreateDialog(savedInstanceState);
EditText text = dialog.findViewById(输入框的id);
text.addTextChangedListener(textWatcher);
}
private TextWatcher textWatcher = new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
mListener.editResult(s.toString());
}
};
public interface ResultListener{
public void editResult(String msg);
}
}
FirstActivity.java:
public class FirstActivity extends Activity implements ResultListener{
@Override
public void editResult(String msg){
//TODO
}
}
[解决办法]
没初始化mListener.