Question

我正在Button Click上动态创建LinearLayout（在另一个包含两个静态EditText和ImageView的布局中），包含EditText和ImageView。但是当应用程序启动时它什么都不会显示那么如何保留LinearLayout。我试过这个。在此先感谢。

 public class HelpAlertActivity extends AppCompatActivity implements View.OnClickListener {

public SharedPreferences sharedpreference;
LinearLayout add_new_layout, mainLayout, image_btn_layout, buttonLayout;
FrameLayout frameLayout;
Button btn_one, bt_submit;
MyEditText et_contact_one, et_contact_two, etAdd;
ImageView image_one, image_two;
ImageButton imageButton;
FloatingActionButton fab;
SharedPreferences.Editor editor;
List<MyEditText> allEds;
List<ImageView> allImg;
ImageView imageView;
String contactOne, contactTwo, number1, number2, number3, number4, number5, number6, number7, number8, number9, number10, number11, number12, number13;
StringBuilder stringBuilder;
private int counter = 0,many=1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_help_alert);

    initialization();
}

private void initialization() {
    sharedpreference = getSharedPreferences("preference", Context.MODE_APPEND);
    editor = sharedpreference.edit();
    allEds = new ArrayList<>();
    allImg = new ArrayList<>();
    mainLayout = (LinearLayout) findViewById(R.id.main_layout);
    image_btn_layout = (LinearLayout) findViewById(R.id.image_btn_layout);
    buttonLayout = (LinearLayout) findViewById(R.id.buttonLayout);
    add_new_layout = (LinearLayout) findViewById(R.id.newLayout);
    fab = (FloatingActionButton) findViewById(R.id.fab);
    et_contact_one = (MyEditText) findViewById(R.id.contact_one);
    et_contact_two = (MyEditText) findViewById(R.id.contact_two);

    image_one = (ImageView) findViewById(R.id.image_one);
    image_two = (ImageView) findViewById(R.id.image_two);
    btn_one = (Button) findViewById(R.id.btn_one);
    bt_submit = (Button) findViewById(R.id.bt_submit);
    fab.setOnClickListener(this);
    image_one.setOnClickListener(this);
    image_two.setOnClickListener(this);
    btn_one.setOnClickListener(this);
    bt_submit.setOnClickListener(this);
    stringBuilder = new StringBuilder();
    if (sharedpreference != null) {
        fab.setVisibility(View.VISIBLE);
        buttonLayout.setVisibility(View.INVISIBLE);
        image_btn_layout.setVisibility(View.INVISIBLE);
    } else {
        buttonLayout.setVisibility(View.VISIBLE);
        image_btn_layout.setVisibility(View.VISIBLE);
        fab.setVisibility(View.INVISIBLE);
    }
    int no_of_layouts = sharedpreference.getInt("no_of_layouts",0);
    while(no_of_layouts>0){
        LinearLayout parentView = (LinearLayout) this.findViewById(R.id.main_layout);
        LinearLayout childView = new LinearLayout(getApplicationContext());
        etAdd = generateEditText(counter);
        //add linear layout
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(45, 45);
        layoutParams.setMargins(0, 25, 20, 0);
        imageView = new ImageView(this);
        imageView.setBackgroundResource(R.drawable.add_contact);
       // imageView.setId(counter + 3);
        imageView.setAdjustViewBounds(true);
        imageView.setLayoutParams(layoutParams);
        getValue(imageView);

        allEds.add(etAdd);
        allImg.add(imageView);
        childView.addView(etAdd);
        childView.addView(imageView);
        parentView.addView(childView);
        no_of_layouts--;
    }
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.btn_one:
            if (this.counter < 10) {
                LinearLayout parentView = (LinearLayout) this.findViewById(R.id.main_layout);
                LinearLayout childView = new LinearLayout(getApplicationContext());
                etAdd = generateEditText(counter);


                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(45, 45);
                layoutParams.setMargins(0, 25, 20, 0);
                imageView = new ImageView(this);
                imageView.setBackgroundResource(R.drawable.add_contact);
                imageView.setId(counter + 3);
                imageView.setAdjustViewBounds(true);
                imageView.setLayoutParams(layoutParams);
                getValue(imageView);

                allEds.add(etAdd);
                allImg.add(imageView);
                childView.addView(etAdd);
                childView.addView(imageView);
               parentView.addView(childView);

                counter++;
                many++;
                editor.putInt("no_of_layouts", many);

            } else {
               // v.setEnabled(false);
            }
            break;
        case R.id.image_one:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 1);
            break;
        case R.id.image_two:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 2);
            break;
        case 3:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 3);
            break;
        case 4:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 4);
            break;
        case 5:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 5);
            break;
        case 6:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 6);
            break;
        case 7:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 7);
            break;
        case 8:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 8);
            break;
        case 9:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 9);
            break;
        case 10:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 10);
            break;
        case 11:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 11);
            break;
        case 12:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 12);
            break;
        case 13:
            startActivityForResult(new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI), 13);
            break;
        case R.id.bt_submit:
            String ctone = et_contact_one.getText().toString();
            String ct_two = et_contact_two.getText().toString();
            int size = allEds.size();
            String[] strings = new String[size];
            for (int i = 0; i < allEds.size(); i++) {

                strings[i] = allEds.get(i).getText().toString();

                editor.putString("contact" + i, strings[i]);
                Log.e("Added number", "" + i);
                // Toast.makeText(this, "contact" + i, Toast.LENGTH_SHORT).show();
            }
            if (ctone.equals("") && ctone.isEmpty() || ct_two.equals("") && ct_two.isEmpty()) {
                Toast.makeText(this, "Please enter mobile", Toast.LENGTH_SHORT).show();
            } else {
                editor.putString("contactOne", ctone);
                editor.putString("contactTwo", ct_two);
                editor.commit();
                Toast.makeText(this, "Contact Saved ", Toast.LENGTH_SHORT).show();
                startActivity(new Intent(this, MainActivity.class));
                //  }

                break;
            }
       case R.id.fab:
            buttonLayout.setVisibility(View.VISIBLE);
            image_btn_layout.setVisibility(View.VISIBLE);
            fab.setVisibility(View.INVISIBLE);
            break;
    }
}

private void getValue(ImageView imageView) {
    imageView.setOnClickListener(this);
}


@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
    super.onActivityResult(reqCode, resultCode, data);
    switch (reqCode) {
        case 1:
            if (resultCode == RESULT_OK) {
            String num = GetContact.getdetails(data, getApplicationContext());
                et_contact_one.setText(num);
            }
            break;
        case 2:
            if (resultCode == RESULT_OK) {
                number2 = GetContact.getdetails(data, getApplicationContext());
                et_contact_two.setText(number2.replaceAll("[- ]",""));
            }
            break;
        case 3:
            if (resultCode == RESULT_OK ) {
                number3 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number3.replaceAll("[- ]",""));
            }
            break;
        case 4:
            if (resultCode == RESULT_OK) {
                number4 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number4.replaceAll("[- ]",""));
            }
            break;
        case 5:
            if (resultCode == RESULT_OK) {
                number5 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number5.replaceAll("[- ]",""));
            }
            break;
        case 6:
            if (resultCode == RESULT_OK) {
                number6 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number6.replaceAll("[- ]",""));
            }
            break;
        case 7:
            if (resultCode == RESULT_OK) {
                number7 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number7.replaceAll("[- ]",""));
            }
            break;
        case 8:
            if (resultCode == RESULT_OK) {
                number8 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number8.replaceAll("[- ]",""));
            }
            break;
        case 9:
            if (resultCode == RESULT_OK) {
                number9 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number9.replaceAll("[- ]",""));
            }
            break;
        case 10:
            if (resultCode == RESULT_OK) {
                number10 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number10.replaceAll("[- ]",""));
            }
            break;
        case 11:
            if (resultCode == RESULT_OK ) {
                number11 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number11.replaceAll("[- ]",""));
            }
            break;
        case 12:
            if (resultCode == RESULT_OK) {
                number12 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number12.replaceAll("[- ]",""));
            }
            break;
        case 13:
            if (resultCode == RESULT_OK) {
                number13 = GetContact.getdetails(data, getApplicationContext());
                etAdd.setText(number13.replaceAll("[- ]",""));
            }
            break;

    }

}

public MyEditText generateEditText(int id) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(0, 90, 1.0f);
    layoutParams.setMargins(15, 10, 0, 0);
    MyEditText et = new MyEditText(this);
    et.setFilters(new InputFilter[]{new InputFilter.LengthFilter(13)});
    et.setBackgroundResource(R.drawable.login_textfield_background);
    et.setHint("Enter or Select number");
    et.setInputType(InputType.TYPE_CLASS_NUMBER);
    et.setPadding(35, 0, 30, 0);
    et.setId(id);
    et.setLayoutParams(layoutParams);
    return et;
}

@Override
protected void onPause() {
    super.onPause();
    contactOne = sharedpreference.getString("contactOne", null);
    contactTwo = sharedpreference.getString("contactTwo", null);
    for (int i = 0; i < allEds.size(); i++) {
        stringBuilder.append(sharedpreference.getString("contact" + i, "")+",");
    }
}

@Override
protected void onResume() {
    super.onResume();
    et_contact_one.setText(contactOne);
    et_contact_two.setText(contactTwo);
    int size = allEds.size();
    String[] strings = new String[size];
    String[] lines = stringBuilder.toString().split(",");
    for(String s : lines) {
        //  etAdd.setText(s);
     /*   strings[i] = allEds.get(i).getText().toString();
        sharedpreference.getString("contact" + i, "");*/
    }

}

/* public ImageView generateImageView(int id) {
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(45, 45);
    layoutParams.setMargins(0, 25, 20, 0);
    ImageView imageView = new ImageView(this);
    imageView.setBackgroundResource(R.drawable.add_contact);
    imageView.setId(id);
    imageView.setAdjustViewBounds(true);
    imageView.setLayoutParams(layoutParams);
    return imageView;
}*/

}

activity_help_alert.xml

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

     >

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <a7colors.com.helpalert.CustomWidget.MyEditText
        android:id="@+id/contact_one"
        android:layout_width="0dp"
        android:layout_height="60dp"
        android:layout_marginStart="10dp"
        android:layout_marginTop="20dp"
        android:layout_weight="1.0"
        android:maxLength="13"
        android:freezesText="true"
        android:background="@drawable/login_textfield_background"
        android:hint="@string/contact_hint"
        android:inputType="number"
        android:paddingLeft="30dp"
        android:paddingRight="30dp"
        tools:ignore="ContentDescription"
        />

    <ImageView
        android:id="@+id/image_one"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_marginEnd="10dp"
        android:layout_marginTop="35dp"
        android:adjustViewBounds="true"
        android:background="@drawable/add_contact"
        tools:ignore="ContentDescription"
        />
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <a7colors.com.helpalert.CustomWidget.MyEditText
        android:id="@+id/contact_two"
        android:layout_width="0dp"
        android:layout_height="60dp"
        android:layout_marginStart="10dp"
        android:layout_marginTop="10dp"
        android:layout_weight="1.0"
        android:maxLength="13"
        android:freezesText="true"
        android:background="@drawable/login_textfield_background"
        android:hint="@string/contact_hint"
        android:inputType="number"
        android:paddingLeft="30dp"
        android:paddingRight="30dp" />

    <ImageView
        android:id="@+id/image_two"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:layout_marginEnd="10dp"
        android:layout_marginTop="25dp"
        android:adjustViewBounds="true"
        android:background="@drawable/add_contact"
        tools:ignore="ContentDescription"
        />
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/main_layout"
    android:orientation="vertical"/>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:id="@+id/image_btn_layout"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_one"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="20dp"
        android:adjustViewBounds="true"
        android:background="@drawable/add_circular_button"
        tools:ignore="ContentDescription" />
</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:layout_marginTop="20dp"
    android:layout_marginBottom="10dp"
    android:gravity="center"
    >

    <a7colors.com.helpalert.CustomWidget.MyButton
        android:id="@+id/bt_submit"
        android:layout_width="wrap_content"
        android:layout_height="46dp"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/login_bt_background"
        android:text="@string/btn_submit"
        android:layout_marginStart="20dp"
        android:layout_marginEnd="30dp"
        android:textColor="@color/white" />
   </LinearLayout>
  </LinearLayout>
</ScrollView>

Answer 1

当你创建了如下所示的布局时，你应该在SharedPreference中保存一个变量。

 case R.id.btn_one:
        if (this.counter < 10) {
            LinearLayout parentView = (LinearLayout) this.findViewById(R.id.main_layout);
            LinearLayout childView = new LinearLayout(getApplicationContext());
            etAdd = generateEditText(counter);
            //add linear layout
            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(45, 45);
            layoutParams.setMargins(0, 25, 20, 0);
            imageView = new ImageView(this);
            imageView.setBackgroundResource(R.drawable.add_contact);
            imageView.setId(counter + 3);
            imageView.setAdjustViewBounds(true);
            imageView.setLayoutParams(layoutParams);
            getValue(imageView);

            allEds.add(etAdd);
            allImg.add(imageView);
            childView.addView(etAdd);
            childView.addView(imageView);
            parentView.addView(childView);
            counter++;
            many++;
            editor.putInt("no_of_layouts", many);
        } else {
            v.setEnabled(false);
        }

on活动初始化检查此变量是否存在，如果为true，则创建如下所示的布局：

private void initialization() {
  sharedpreference = getSharedPreferences("preference", 
   Context.MODE_APPEND);
   editor = sharedpreference.edit();
   allEds = new ArrayList<>();
   allImg = new ArrayList<>();
   mainLayout = (LinearLayout) findViewById(R.id.main_layout);
   add_new_layout = (LinearLayout) findViewById(R.id.newLayout);
   et_contact_one = (MyEditText) findViewById(R.id.contact_one);
   et_contact_two = (MyEditText) findViewById(R.id.contact_two);
   image_one = (ImageView) findViewById(R.id.image_one);
   image_two = (ImageView) findViewById(R.id.image_two);
   btn_one = (Button) findViewById(R.id.btn_one);
   bt_submit = (Button) findViewById(R.id.bt_submit);
   image_one.setOnClickListener(this);
   image_two.setOnClickListener(this);
   btn_one.setOnClickListener(this);
   bt_submit.setOnClickListener(this);
   // adding layout if created
   int no_of_layouts = sharedpreference.getInt("no_of_layouts",0);
   while(no_of_layouts>0){
        // add whatever layout you have added before in onclick
    no_of_layout--;
   }

}

PS：我假设SharedPreference并且点击逻辑工作正常。如果您遇到任何问题，请告诉我。

android-如何在应用启动时保留动态添加的布局

1 个答案: