超简单的自定义AlertDialog弹出键盘可以输入的

private void showAlertDialog() {
final AlertDialog dialog = new AlertDialog.Builder(this).create();
dialog.setView(LayoutInflater.from(this).inflate(R.layout.alert_dialog, null));
dialog.show();
dialog.getWindow().setContentView(R.layout.alert_dialog);
Button btnPositive = (Button) dialog.findViewById(R.id.btn_add);
Button btnNegative = (Button) dialog.findViewById(R.id.btn_cancel);
final EditText etContent = (EditText) dialog.findViewById(R.id.et_content);
btnPositive.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
String str = etContent.getText().toString();
if (isNullEmptyBlank(str)) {
etContent.setError("输入内如不能为空");
} else {
dialog.dismiss();
Toast.makeText(MainActivity.this, etContent.getText().toString(), Toast.LENGTH_LONG).show();
}
}
});
btnNegative.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
dialog.dismiss();
}
});
}

private static boolean isNullEmptyBlank(String str) {
if (str == null || "".equals(str) || "".equals(str.trim()))
return true;
return false;
}