TextView 文本已更改但未显示

Question

我有一个文本视图，当我使用 tv.setText("hello"); 更改文本时，它会更改文本，因为我使用 'Log.d(TAG, tv.getText());' 进行检查，但是当我运行应用程序时，更改不会在视觉上显示出来。可能是什么问题？

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getBundleData();
    setContentView(R.layout.activity_device_sensor_report);

    context = this;


    tempN = (TextView) findViewById(R.id.tv_temperature_num);
    tempC = (TextView) findViewById(R.id.tv_temperature_cat);
    humidityC = (TextView) findViewById(R.id.tv_humidity_cat);


    tempN.setText("" + liveDataNum[0]);
    humidityC.setText("" + liveDataCat[1]);
    Log.d("TAG", ""+humidityC.getText());

    drawGraph();

}

XML（相当复杂）：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <include
        android:id="@+id/main_toolbar"
        layout="@layout/toolbar" />

    <HorizontalScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="0dp"
        android:id="@+id/sv_liveData">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="0dp">

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:gravity="center"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <TextView
                        android:id="@+id/tv_temperature_num"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_margin="10dp"
                        android:background="@drawable/devicecardstatus"

                        android:gravity="center" />
                </LinearLayout>

                <TextView
                    android:id="@+id/tv_temperature_cat"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:gravity="center"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <TextView
                        android:id="@+id/tv_humidity_num"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_margin="10dp"
                        android:background="@drawable/devicecardstatus"
                        android:gravity="center"
                        android:text="00" />
                </LinearLayout>

                <TextView
                    android:id="@+id/tv_humidity_cat"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical"
                    android:text="Lorem ipsum" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:gravity="center"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <TextView
                        android:id="@+id/tv_carbonMonoxide_num"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_margin="10dp"
                        android:background="@drawable/devicecardstatus"
                        android:gravity="center"
                        android:text="00" />
                </LinearLayout>

                <TextView
                    android:id="@+id/tv_carbonMonoxide_cat"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical"
                    android:text="Lorem ipsum" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:gravity="center"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <TextView
                        android:id="@+id/tv_ozone_num"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_margin="10dp"
                        android:background="@drawable/devicecardstatus"
                        android:gravity="center"
                        android:text="00" />
                </LinearLayout>

                <TextView
                    android:id="@+id/tv_ozone_cat"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical"
                    android:text="Lorem ipsum" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:gravity="center"
                android:orientation="vertical">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <TextView
                        android:id="@+id/tv_sulfurDioxide_num"
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:layout_margin="10dp"
                        android:background="@drawable/devicecardstatus"
                        android:gravity="center"
                        android:text="00" />
                </LinearLayout>

                <TextView
                    android:id="@+id/tv_sulfurDioxide_cat"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical"
                    android:text="Lorem ipsum" />
            </LinearLayout>
        </LinearLayout>
    </HorizontalScrollView>


    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <include layout="@layout/activity_device_historical_report" />
    </ScrollView>
</LinearLayout>

截图：https://drive.google.com/open?id=0BxkScLxtYNVdZHVnZ2RVS0x2a1k

编辑：我清理/重建，这就是发生的事情：

Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence$1) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.
Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
Error:(org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence$2) that doesn't come with an
Error:associated EnclosingMethod attribute. This class was probably produced by a
Error:compiler that did not target the modern .class file format. The recommended
Error:solution is to recompile the class from source, using an up-to-date compiler
Error:and without specifying any "-target" type options. The consequence of ignoring
Error:this warning is that reflective operations on this class will incorrectly
Error:indicate that it is *not* an inner class.

Answer 1

请发布您的完整代码。我认为问题是别的。您上面发布的代码是正确的。但是在那之后实现了哪些代码？我认为该代码会影响您的 xml

TextView humidityC = (TextView) findViewById(R.id.tv_humidity_cat);
        humidityC.setText("Humidity");
        Log.d("TAG", ""+humidityC.getText());