在 Android 应用中使用警示框 Alerts
Alerts 是 Android 提供的一些标准提示对话框
1. [代码]java代码
//declared as final to be able to reference it in inner class declartations of the handlers
final AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setTitle("Alert Dialog");
builder.setMessage("This is the alert's body");
builder.setIcon(android.R.drawable.ic_dialog_alert);
builder.setPositiveButton("OK", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
TextView txt=(TextView)findViewById(R.id.txt);
txt.setText("You clicked Ok");
}
});
builder.setNegativeButton("Cancel", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
TextView txt=(TextView)findViewById(R.id.txt);
txt.setText("You clicked Cancel");
}
});
builder.setNeutralButton("Do something", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
TextView txt=(TextView)findViewById(R.id.txt);
txt.setText("Neutral Button Clicked");
AlertDialog ad=builder.create();
ad.cancel();
}
});
builder.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
// TODO Auto-generated method stub
TextView txt=(TextView)findViewById(R.id.txt);
txt.setText(txt.getText()+" the cancel listner invoked");
}
});
builder.show();
2. [图片] alerts1.png
