Android Studio“运行应用”对话框未出现在一个项目中，但将出现在另一个项目中

Question

我在玩Android Studio，制作一个非常简单，非常愚蠢的应用，以了解
有关保存关键首选项的知识，但遇到了一个奇怪的障碍。我将尽力
提供尽可能多的内容，因为可能很难重现此错误，但是
老实说，我正在运行的两个应用程序都是超级基本的，并且没有编译
错误。

规格：没有模拟器，我正在运行Samsung Galaxy Tablet。Windows 7，Android
Studio 1.2，Gradle 2.2.1。

在问题标题中，我的意思是我有一个名为Kitty的项目（几乎是hello world和一个按钮）。我单击运行->“运行应用程序”->（
打开对话框）->确定->，然后立即在平板电脑上启动该应用程序。

这是我要看的盒子！

^^^这是我想在Sharedpreferences上看到的美丽屏幕，但这仅是在kitty上。

现在，我启动了另一个名为SharedPreferences的项目（要点：两个复选框询问您“您喜欢巧克力”还是“您喜欢路易斯饼干”，然后选择一个或两个都不选中，然后按Save。下面的两个textview将更新以表示您是否
喜欢这些东西）甚至在以后重新打开应用程序时，textviews也会记住Chocolate Luigi首选项。这只是一个main_activity。

我不认为我在这两者之间更改了任何设置或项目首选项，也没有给我一个错误。MainActivity.java过时的原始编辑：

package gaga.sharedpreferences;

import android.content.SharedPreferences;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CheckedTextView;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    public final class setup extends MainActivity {
        public void setup () {
            //Nothing to see here!
        }

        // Define the File of Prefs; created if nonexistent
        public static final String PREFS_NAME = "MyPrefsFile";

        // Start up
        @Override
        public void onCreate(Bundle state) {
            super.onCreate(state);

            // Restore preferences on Startup
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            boolean Chocolate = settings.getBoolean("checkChocolate", false);
            boolean Luigi = settings.getBoolean("checkLuigi", false);
            // Function set to Whatever
            // setSilent(silent);
            /* Note:
            * CheckedTextView and CheckBox::isChecked()
            * CheckBox::setChecked()
            * */
            CheckBox checkHandleChocolate = (CheckBox) findViewById(R.id.checkChocolate);
            CheckBox checkHandleLuigi = (CheckBox) findViewById(R.id.checkLuigi);

            // What was the preference? On Start set it to the bool it left off in
            checkHandleChocolate.setChecked(Chocolate);
            checkHandleLuigi.setChecked(Luigi);

            // Change report text on Start
            TextView buttonHandleChocolate = (TextView) findViewById(R.id.chocolate);
            TextView buttonHandleLuigi = (TextView) findViewById(R.id.luigi);

            if(Chocolate)
                buttonHandleChocolate.setText("I do prefer Chocolate");
            else
                buttonHandleChocolate.setText("I do not prefer Chocolate");
            if(Luigi)
                buttonHandleLuigi.setText("I do prefer Luigi");
            else
                buttonHandleLuigi.setText("I do not prefer Luigi");

        }

        public void saveChocolate(Boolean c) {
            // All objects from android.context.Context
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putBoolean("Chocolate", c);
            // Commit the edits
            editor.commit();
        }
        public void saveLuigi(Boolean l) {
            // All objects from android.context.Context
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putBoolean("Chocolate", l);
            // Commit the edits
            editor.commit();
        }
    }


    @Override
    protected void onStop(){
        super.onStop();
        // Objects are from android.context.Context
        //Normally I'd put the edit commits here, but that's not true
    }

    // Clicks on Done
    public void userDone (View view) {
        // View is which widget
        boolean checked = ((CheckBox) view).isChecked();

        // Which checkbox was clicked
        switch(view.getId()) {
            case R.id.checkChocolate:
                setup instance1 = new setup();
                instance1.saveChocolate(checked);
                // No break; continue along
            case R.id.checkLuigi:
                setup instance2 = new setup();
                instance2.saveLuigi(checked);
                break;
        }
    }


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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Red parts of logcat:

06-02 20:49:57.245  25557-25557/? I/SDP.PUB_CRYPTOD﹕ Starting
06-02 20:49:57.245  25557-25557/? I/SDP.PUB_CRYPTOD﹕ Socket created with fd:-1
06-02 20:49:57.245  25557-25557/? E/SDP.PUB_CRYPTOD﹕ Failed to open the netlink socket with error: Protocol not supported
06-02 20:49:57.245  25557-25557/? E/SDP.PUB_CRYPTOD﹕ Exiting
06-02 20:49:59.995    2866-3012/? V/AlarmManager﹕ waitForAlarm result :8
06-02 20:50:02.280  25633-25633/? I/SDP.PUB_CRYPTOD﹕ Starting
06-02 20:50:02.280  25633-25633/? I/SDP.PUB_CRYPTOD﹕ Socket created with fd:-1
06-02 20:50:02.280  25633-25633/? E/SDP.PUB_CRYPTOD﹕ Failed to open the netlink socket with error: Protocol not supported
06-02 20:50:02.280  25633-25633/? E/SDP.PUB_CRYPTOD﹕ Exiting

Thanks for any help. I haven’t seen this issue while prowling the internet so
it might be excessively noob.

EDIT: Rewritten with the only onCreate in the larger MainActivity class

package gaga.sharedpreferences;

import android.content.SharedPreferences;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CheckedTextView;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    public final class setup extends MainActivity {
        public void setup () {
            //Nothing to see here!
        }

        // Define the File of Prefs; created if nonexistent
        public static final String PREFS_NAME = "MyPrefsFile";

        // Start up
        public void onCreateSubclass() {
            // super.onCreate(state);

            // Restore preferences on Startup
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            boolean Chocolate = settings.getBoolean("checkChocolate", false);
            boolean Luigi = settings.getBoolean("checkLuigi", false);
            // Function set to Whatever
            // setSilent(silent);
            /* Note:
            * CheckedTextView and CheckBox::isChecked()
            * CheckBox::setChecked()
            * */
            CheckBox checkHandleChocolate = (CheckBox) findViewById(R.id.checkChocolate);
            CheckBox checkHandleLuigi = (CheckBox) findViewById(R.id.checkLuigi);

            // What was the preference? On Start set it to the bool it left off in
            checkHandleChocolate.setChecked(Chocolate);
            checkHandleLuigi.setChecked(Luigi);

            // Change report text on Start
            TextView buttonHandleChocolate = (TextView) findViewById(R.id.chocolate);
            TextView buttonHandleLuigi = (TextView) findViewById(R.id.luigi);

            if(Chocolate)
                buttonHandleChocolate.setText("I do prefer Chocolate");
            else
                buttonHandleChocolate.setText("I do not prefer Chocolate");
            if(Luigi)
                buttonHandleLuigi.setText("I do prefer Luigi");
            else
                buttonHandleLuigi.setText("I do not prefer Luigi");

        }

        public void saveChocolate(Boolean c) {
            // All objects from android.context.Context
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putBoolean("Chocolate", c);
            // Commit the edits
            editor.commit();
        }
        public void saveLuigi(Boolean l) {
            // All objects from android.context.Context
            SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putBoolean("Chocolate", l);
            // Commit the edits
            editor.commit();
        }
    }


    @Override
    protected void onStop(){
        super.onStop();
        // Objects are from android.context.Context
        //Normally I'd put the edit commits here, but that's not true
    }

    // Clicks on Done
    public void userDone (View view) {
        // View is which widget
        boolean checked = ((CheckBox) view).isChecked();

        // Which checkbox was clicked
        switch(view.getId()) {
            case R.id.checkChocolate:
                setup instance1 = new setup();
                instance1.saveChocolate(checked);
                // No break; continue along
            case R.id.checkLuigi:
                setup instance2 = new setup();
                instance2.saveLuigi(checked);
                break;
        }
    }


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

        setup startInstance = new setup();
        startInstance.onCreateSubclass();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

在Android Studio中，您需要在项目中创建运行配置。