Question

我创建了一个用于学习的迷你App，
当任何用户在EditText中给出任何数字并单击提交时，则TextView＆amp; EditText基于给定的Digit动态创建。
创建新的EditText后，用户在EditText中填充数据并单击提交按钮...
当用户点击提交数据时，必须传递新意图并在其中显示该数据。

我的问题是，当我点击提交按钮时，
仅显示上一个EditText值...

我该怎么办？
提前致谢...！！！
这是我的代码......

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

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

        <EditText
            android:id="@+id/editText1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="Enter Digit Here" >

            <requestFocus />
        </EditText>
    </LinearLayout>

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

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

            <Button
                android:id="@+id/button1"
                style="?android:attr/buttonStyleSmall"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="ADD" />

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

                <Button
                    android:id="@+id/button2"
                    style="?android:attr/buttonStyleSmall"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="DELETE" />
            </LinearLayout>

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

                <Button
                    android:id="@+id/button3"
                    style="?android:attr/buttonStyleSmall"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="SUBMIT" />
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>

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


    </LinearLayout>

</LinearLayout>

MainAvtivity.java

package com.example.textviewdemo;

import java.util.ArrayList;
import java.util.List;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    private TextView addTv;
    private EditText edt, edtAdd, edArray;
    private Button add, delete, submit;
    LinearLayout layout;
    List<EditText> allEds;

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

        edt = (EditText) findViewById(R.id.editText1);
        add = (Button) findViewById(R.id.button1);
        delete = (Button) findViewById(R.id.button2);
        submit = (Button) findViewById(R.id.button3);

        layout = (LinearLayout) findViewById(R.id.LinearLayout);

        add.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                int no = Integer.parseInt(edt.getText().toString());
                allEds = new ArrayList<EditText>();

                for (int i = 0; i < no; i++) {

                    addTv = new TextView(MainActivity.this);

                    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                            LayoutParams.WRAP_CONTENT,
                            LayoutParams.WRAP_CONTENT);
                    layout.setLayoutParams(params);
                    addTv.setText("TextView " + i);
                    addTv.setId(i);
                    layout.addView(addTv);

                    edtAdd = new EditText(MainActivity.this);

                    layout.setLayoutParams(params);
                    allEds.add(edtAdd);
                    edtAdd.setText("Test" + i);
                    edtAdd.setId(i);
                    layout.addView(edtAdd);
                }
            }
        });
        submit.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent data = new Intent(MainActivity.this, Display.class);
                String[] items = new String[allEds.size()];
                String str = String.valueOf(allEds.size());
                for (int j = 0; j < allEds.size(); j++) {
                    items[j] = allEds.get(j).getText().toString();
                    data.putExtra("edData", items[j]);
                    data.putExtra("size", str);
                    /*
                     * Toast.makeText(getApplicationContext(), items[j],
                     * Toast.LENGTH_SHORT).show();
                     */
                }

                startActivity(data);
            }
        });
        delete.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                layout.removeAllViews();

            }
        });
    }
}

Display.xml

<?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" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:id="@+id/LinearLayout_1" >
    </LinearLayout>

    </LinearLayout>

Display.java

package com.example.textviewdemo;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;

public class Display extends ActionBarActivity {

    TextView getText;
    LinearLayout linear;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.display);
        Intent get = getIntent();

        linear = (LinearLayout) findViewById(R.id.LinearLayout_1);

        int size = Integer.parseInt((get.getExtras().getString("size")));
        for (int i = 0; i < size; i++) {
            getText = new TextView(Display.this);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            getText.setText(get.getExtras().getString("edData"));
            linear.setLayoutParams(params);
            getText.setId(i);
            linear.addView(getText);
        }

    }
}

Answer 1

My Problem is that when I click on submit button,
only Last EditText Value is display...

因为，您使用此密钥覆盖for循环中的数据：

for (int j = 0; j < allEds.size(); j++) {
    items[j] = allEds.get(j).getText().toString();
    data.putExtra("edData", items[j]);
    data.putExtra("size", str);
}

之后，使用索引ID检索直到j = size。

您可以在key中使用index或传递String数组本身：

方法1：

data.putExtra("size", str);  //you don't need to keep this in loop as its same.
for (int j = 0; j < allEds.size(); j++) {
    items[j] = allEds.get(j).getText().toString();
    data.putExtra("edData"+j, items[j]);
}

和

int size = Integer.parseInt(getIntent().getStringExtra("size"));
for (int j = 0; j < size; j++) {
    Intent intent = getIntent();
    String str = intent.getStringExtra("edData"+j);
}

方法2：

在intent中传递String数组，稍后在第二个活动中检索它：

intent.putExtra("strings", myStringArray);

和

Intent intent = getIntent();
String[] myStrings = intent.getStringArrayExtra("strings");

希望这有帮助。

Answer 2

请在下面查看您每次更新的价值，这就是为什么它只显示最后一位数字。

package com.example.textviewdemo;

    import java.util.ArrayList;
    import java.util.List;

    import android.content.Intent;
    import android.os.Bundle;
    import android.support.v7.app.ActionBarActivity;
    import android.view.View;
    import android.view.ViewGroup.LayoutParams;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.LinearLayout;
    import android.widget.TextView;

    public class MainActivity extends ActionBarActivity {

        private TextView addTv;
        private EditText edt, edtAdd, edArray;
        private Button add, delete, submit;
        LinearLayout layout;
        List<EditText> allEds;

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

            edt = (EditText) findViewById(R.id.editText1);
            add = (Button) findViewById(R.id.button1);
            delete = (Button) findViewById(R.id.button2);
            submit = (Button) findViewById(R.id.button3);

            layout = (LinearLayout) findViewById(R.id.LinearLayout);

            add.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    int no = Integer.parseInt(edt.getText().toString());
                    allEds = new ArrayList<EditText>();

                    for (int i = 0; i < no; i++) {

                        addTv = new TextView(MainActivity.this);

                        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                                LayoutParams.WRAP_CONTENT,
                                LayoutParams.WRAP_CONTENT);
                        layout.setLayoutParams(params);
                        addTv.setText("TextView " + i);
                        addTv.setId(i);
                        layout.addView(addTv);

                        edtAdd = new EditText(MainActivity.this);

                        layout.setLayoutParams(params);
                        allEds.add(edtAdd);
                        edtAdd.setText("Test" + i);
                        edtAdd.setId(i);
                        layout.addView(edtAdd);
                    }
                }
            });
            submit.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    Intent data = new Intent(MainActivity.this, Display.class);
                    String[] items = new String[allEds.size()];
                    String str = String.valueOf(allEds.size());
                    for (int j = 0; j < allEds.size(); j++) {
                        items[j] = allEds.get(j).getText().toString();
                        /*
                         * Toast.makeText(getApplicationContext(), items[j],
                         * Toast.LENGTH_SHORT).show();
                         */
                    }
                    //changes made here
                        data.putExtra("edData", items);
                        data.putExtra("size", str);

                    startActivity(data);
                }
            });
            delete.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {

                    layout.removeAllViews();

                }
            });
        }
    }



package com.example.textviewdemo;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;
import android.widget.TextView;

public class Display extends ActionBarActivity {

    TextView getText;
    LinearLayout linear;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.display);
        Intent get = getIntent();

        linear = (LinearLayout) findViewById(R.id.LinearLayout_1);

        int size = Integer.parseInt((get.getExtras().getString("size")));
        for (int i = 0; i < size; i++) {
            getText = new TextView(Display.this);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);


            String[] data = get.getExtras().getString("edData");
            String textOnRequest = ";
            for(int i=0 ; i < data.length ; i++){
                textOnResponse += data[i];
            }
            getText.setText(textOnResponse);
            linear.setLayoutParams(params);
            getText.setId(i);
            linear.addView(getText);
        }

    }
}

Answer 3

您可以使用“共享首选项”存储值，稍后您可以从共享首选项中检索。

写入共享首选项

SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPref.edit();
editor.putInt(getString(R.string.saved_high_score), newHighScore);
editor.commit();

从共享首选项中读取

SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
int defaultValue = getResources().getInteger(R.string.saved_high_score_default);
long highScore = sharedPref.getInt(getString(R.string.saved_high_score), defaultValue);

签入Google API Shared - Preferences

Answer 4

在data.putExtra循环size之外的edData和for键移动data.putExtra，就像具有唯一键的地图一样

// Prepare items Array 
for (int j = 0; j < allEds.size(); j++) {
    items[j] = allEds.get(j).getText().toString();
}
data.putExtra("edData", items);
data.putExtra("size", str);

现在将edData作为字符串数组而不是来自Bundle的字符串。

在另一个Activity中显示动态创建的EditText的值

4 个答案: