我在android.now中制作了一个简单的警报框程序,我必须把两个按钮“确定”和“取消”但是当我运行程序时它只显示“取消”按钮...我的代码是如下:
Main.java
public class MainActivity extends Activity {
Button btn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button)findViewById(R.id.button);
final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
alertDialog.setTitle("Title");
alertDialog.setMessage("Message");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Add your code for the button here.
Toast.makeText(getApplicationContext(), "well come", 1).show();
}
});
alertDialog.setButton("cancel",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "yoy have pressed cancel", 1).show();
}
});
// Set the Icon for the Dialog
alertDialog.setIcon(R.drawable.ic_launcher);
alertDialog.show();
// see http://androidsnippets.com/simple-alert-dialog-popup-with-title-message-icon-and-button
}
});
}
}
提前谢谢。
答案 0 :(得分:4)
我遇到了同样的问题。这就是做了。
public class MainActivity extends Activity {
Button btn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button)findViewById(R.id.button);
final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
alertDialog.setTitle("Title");
alertDialog.setMessage("Message");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(getApplicationContext(), "well come", 1).show();
}
});
alertDialog.setButton2("cancel",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(getApplicationContext(), "yoy have pressed cancel", 1).show();
}
});
// Set the Icon for the Dialog
alertDialog.setIcon(R.drawable.ic_launcher);
alertDialog.show();
// see http://androidsnippets.com/simple-alert-dialog-popup-with-title-message-icon-and-button
}
});
}
}
这很好用。您必须为alert-box按钮编号。
答案 1 :(得分:1)
我们安排setPositiveButton
为ok
,setNegativeButton
为cancel
按钮。
final AlertDialog.Builder alertDialog= new AlertDialog.Builder(this);
alertDialog.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Add your code for the button here.
Toast.makeText(getApplicationContext(), "well come", 1).show();
}
});
alertDialog.setNegativeButton("cancel",new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "yoy have pressed cancel", 1).show();
}
});
答案 2 :(得分:1)
添加按钮的正确方法:
积极
alertDialog.setPositiveButton("OK",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// perform your action
}
});
对于否定
alertDialog.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});
答案 3 :(得分:1)
简单警报
private AlertDialog AskOption()
{
AlertDialog myQuittingDialogBox =new AlertDialog.Builder(this)
//set message, title, and icon
.setTitle("Title")
.setMessage("Message")
.setIcon(R.drawable.icon)
.setPositiveButton("yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
//your code
}
})
.setNeutralButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.dismiss();
}
})
.create();
return myQuittingDialogBox;
}
使用
AlertDialog al = AskOption();
al.show();
答案 4 :(得分:0)
public void showDialog(Activity activity, String title, CharSequence message) {
AlertDialog.Builder builder = new AlertDialog.Builder(activity);
if (title != null)
builder.setTitle(title);
builder.setMessage(message);
builder.setPositiveButton("OK", null);
builder.setNegativeButton("Cancel", null);
builder.show();
}
答案 5 :(得分:0)
您可以使用AlertDialog.Builder课程。有一些方法可以使用此构建器类在对话框上放置按钮。
答案 6 :(得分:0)
你需要使用setPositiveButton()和setnegativeButton()之类的,
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
Button btn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn = (Button)findViewById(R.id.button);
final AlertDialog alertDialog = new AlertDialog.Builder(this).create();
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
alertDialog.setTitle("Title");
alertDialog.setMessage("Message");
alertDialog.setPositiveButton("OK",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
Toast.makeText(getApplicationContext(), "well come", 1).show();
}
});
alertDialog.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
Toast.makeText(getApplicationContext(), "yoy have pressed cancel", 1).show();
}
});
// Set the Icon for the Dialog
alertDialog.setIcon(R.drawable.ic_launcher);
alertDialog.show();
// see http://androidsnippets.com/simple-alert-dialog-popup-with-title-message-icon-and-button
}
});
}
}