Question

以下是我的代码。请帮我在我的Android应用程序中添加进度条。我的应用程序是一种消息传递应用程序，我希望当我按下发送短信按钮时应显示循环进度条，进度条应该在收到短信时禁用。请查看我的代码并建议我该怎么做。请提及完整的细节，因为我是初学者，所以快捷方式的理解对我来说很难。三江源

    import android.content.Context;
    import android.content.Intent;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.telephony.SmsManager;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.content.BroadcastReceiver;
    import android.content.IntentFilter;
    import android.widget.TextView;


    public class MainActivity extends AppCompatActivity {
        Button btnSendSMS;
        EditText enteredNum;
        IntentFilter intentFilter;
        private BroadcastReceiver intentReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                //---display the SMS received in the TextView---
                TextView SMSes = (TextView) findViewById(R.id.textView1);
                SMSes.setText(intent.getExtras().getString("sms"));
            }
        };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //---intent to filter for SMS messages received---
        intentFilter = new IntentFilter();
        intentFilter.addAction("SMS_RECEIVED_ACTION");
        btnSendSMS = (Button) findViewById(R.id.btnSendSMS);
        btnSendSMS.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                enteredNum = (EditText) findViewById(R.id.enterDetail);
                assert enteredNum != null;
                sendSMS("51522", "HELP " + enteredNum.getText().toString().replaceAll(" ","").toUpperCase());
            }
        });
    }
    @Override
    protected void onResume() {
//---register the receiver---
        registerReceiver(intentReceiver, intentFilter);
        super.onResume();
    }
    @Override
    protected void onPause() {
//---unregister the receiver---
        unregisterReceiver(intentReceiver);
        super.onPause();
    }
private void sendSMS(String phoneNumber, String message)
    {
        SmsManager sms = SmsManager.getDefault();
        sms.sendTextMessage(phoneNumber, null, message, null, null);
    }
}

Answer 1

您可以在activity_main.xml

中添加 ProgressBar 元素

然后，在您的Activity中，您可以使用属性 setVisibility（）来显示（ View.VISIBLE ）您的ProgressBar并隐藏（ View.GONE < / em>）您的布局或内容。

More information here
祝你好运！

如何在android中显示进度条并在内容加载时隐藏

1 个答案: