Question

我有一个带有按钮的应用程序，也有一个textview（数字，例如100）

我是点击按钮，然后将Textview（值）增加5。

我正在尝试将该值发送到Php表行，并且也在同一文本视图中检索表行数据。

在应用程序中

已关闭并打开，然后根据Texview获取PHP数据（服务器）

my_table

id
用户名
金额

MyActivity.java

public class MainActivity extends AppCompatActivity {
    int minteger = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void increaseInteger(View view) {
        minteger = minteger + 5 ;
        display(minteger);
    }

    private void display(int number) {

        TextView displayInteger = (TextView) findViewById(
                R.id.integer_number);
        displayInteger.setText("Integer: " + number);
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="16dp"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Click the plus button to increase integer number" />

    <TextView
        android:id="@+id/integer_number"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginBottom="16dp"
        android:textSize="30sp"
        android:text="Integer: 0" />

    <Button
        android:id="@+id/increase"
        android:onClick="increaseInteger"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="INCREASE" />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="bottom"
        android:textSize="20sp"
        android:text="viralandroid.com"/>
</LinearLayout>

Answer 1

首先在private: System::Void btnOpenImage_Click(System::Object^ sender, System::EventArgs^ e) { //Stream; IO::Stream^ myStream; OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog; openFileDialog1->InitialDirectory = Directory::GetCurrentDirectory(); openFileDialog1->Filter = "Image Files (JPEG,GIF,BMP,PNG,ICO)|*.jpg;*.jpeg;*.gif;*.bmp;*.png;*ico"; openFileDialog1->FilterIndex = 2; openFileDialog1->RestoreDirectory = true; if ( openFileDialog1->ShowDialog() ==System::Windows::Forms::DialogResult::OK) { file_path_temp = "image_0003.jpg"; txtImgUrl->Text = file_path_temp; IntPtr pointer_temp = Marshal::StringToHGlobalAnsi(file_path_temp); const char* input_location = static_cast<const char*>(pointer_temp.ToPointer()); cv::Mat imgOriginalScene = cv::imread(input_location, CV_LOAD_IMAGE_ANYDEPTH | CV_LOAD_IMAGE_ANYCOLOR); Marshal::FreeHGlobal(pointer_temp); } }内初始化TextView和您的Button，然后从onCreate方法中删除初始化。

display

跟随Android Button Onclick处理Android @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); displayInteger = (TextView) findViewById( R.id.integer_number); Button myButton = (Button) findViewById( R.id.yourButtonId); // Here you'll need onClickListener for the button to handle if button clicked, increase the number and etc or calling methods. }单击。但是，要点是，如果将Button添加到Button，则可以调用display或只调用onClickListener内的setText，而无需其他方法。（简化）

还添加：

onClickListener

在TextView displayInteger;的上方，可以访问onCreate和当前课程的整个范围。

要将字符串发送到服务器端，请点击以下链接：How send data to website by using android app

您首先需要通过Activity获取文本，然后以字符串形式发送到服务器：How to get EditText value and display it on screen through TextView?

从服务器检索和向服务器发送Textview值

1 个答案: