Java 警报对话框不出现
当我按下按钮时,警报对话框不会出现。代码如下: 请你告诉我它出了什么问题,我能做些什么来修复它Java 警报对话框不出现,java,android,class,alert,Java,Android,Class,Alert,当我按下按钮时,警报对话框不会出现。代码如下: 请你告诉我它出了什么问题,我能做些什么来修复它 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.row_item); Button bDR = (Button) findViewById(R.id.bDR); bDR.se
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.row_item);
Button bDR = (Button) findViewById(R.id.bDR);
bDR.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(DeleteRenameList.this);
builder.setCancelable(true);
builder.setMessage("Would you like to delete or rename the list?");
builder.setNegativeButton("Delete", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNeutralButton("Rename", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
请参阅帮助尝试以下格式:
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
Context context = this;
Button button;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button = (Button) findViewById(R.id.buttonAlert);
// add button listener
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);
// set title
alertDialogBuilder.setTitle("Your Title");
// set dialog message
alertDialogBuilder
.setMessage("Would you like to delete or rename the list?")
.setCancelable(false)
.setPositiveButton("Delete",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
}
})
.setNegativeButton("Rename",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
}
});
// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
});
}
}
试试这个
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.row_item);
Button bDR = (Button) findViewById(R.id.bDR);
bDR.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
AlertDialog.Builder builder = new
AlertDialog.Builder(DeleteRenameList.this).create();
builder.setCancelable(true);
builder.setMessage("Would you like to delete or rename the list?");
builder.setNegativeButton("Delete", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNeutralButton("Rename", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog.show();
}
});
您确定它是在名为
DeleteRenameList
的类中定义的,该类的类型为Activity
?Negative button而不是neutral button。