如何在Android中将我的短信应用取消设置为默认应用

我想取消设置我的短信应用是否为android中的默认应用。我将学习本教程：

我可以通过以下代码将我的短信应用设置为默认短信应用：

Intent intent = new Intent(context, Sms.Intents.ACTION_CHANGE_DEFAULT);
intent.putExtra(Sms.Intents.EXTRA_PACKAGE_NAME, context.getPackageName());
startActivity(intent);

但我想将我的短信应用程序取消设置为默认应用程序。我该怎么做

这里有一点需要注意：我已经安装了消息传递经典应用程序。从该应用程序中，我可以将我的短信应用程序设置为默认设置。

在您阅读此答案之前，您可以先看一看（我希望在使用此应用程序之前就想到这一点）。如果你想让用户选择设置哪个应用程序，而不是让系统恢复到它决定的任何应用程序，这个答案仍然很方便

---

要取消选择您的应用程序作为默认SMS应用程序，您可以让用户选择另一个符合条件的应用程序作为默认应用程序来代替您的应用程序，并使用该软件包名称启动

操作\u更改\u默认值

意图

为了简化这个过程，我编写了

selectDefaultSmsPackage（）

方法，该方法将查找所有接受

“android.provider.Telephony.SMS\u DELIVER”

广播（不包括当前软件包）的应用程序，并提示用户从中进行选择。这是一个相当幼稚的筛选标准，但最糟糕的情况是，所选应用程序无法成功设置为默认应用程序

从列表中选择所需的应用程序后，将出现通常的是/否验证对话框。当

活动

收到结果时，将所选应用程序的程序包名称与当前设置为默认的程序包名称进行比较，以确定是否成功。由于一些用户报告，在这种情况下，结果代码不可靠，因此检查当前默认值是保证结果正确的唯一方法

我们将使用自定义的

对话框

列出符合条件的应用程序的显示名称和图标。创建应用程序对话框的

活动必须在AppSelectedListener上实现其
接口

public class MainActivity extends Activity
    implements AppsDialog.OnAppSelectedListener {
    ...

    private static final int DEF_SMS_REQ = 0;
    private AppInfo selectedApp;

    private void selectDefaultSmsPackage() {
        final List<ResolveInfo> receivers = getPackageManager().
            queryBroadcastReceivers(new Intent(Sms.Intents.SMS_DELIVER_ACTION), 0);

        final ArrayList<AppInfo> apps = new ArrayList<>();
        for (ResolveInfo info : receivers) {
            final String packageName = info.activityInfo.packageName;

            if (!packageName.equals(getPackageName())) {
                final String appName = getPackageManager()
                    .getApplicationLabel(info.activityInfo.applicationInfo)
                    .toString();
                final Drawable icon = getPackageManager()
                    .getApplicationIcon(info.activityInfo.applicationInfo);

                apps.add(new AppInfo(packageName, appName, icon));
            }
        }

        Collections.sort(apps, new Comparator<AppInfo>() {
                @Override
                public int compare(AppInfo app1, AppInfo app2) {
                    return app1.appName.compareTo(app2.appName);
                }
            }
        );

        new AppsDialog(this, apps).show();
    }

    @Override
    public void onAppSelected(AppInfo selectedApp) {
        this.selectedApp = selectedApp;

        Intent intent = new Intent(Sms.Intents.ACTION_CHANGE_DEFAULT);
        intent.putExtra(Sms.Intents.EXTRA_PACKAGE_NAME, selectedApp.packageName);
        startActivityForResult(intent, DEF_SMS_REQ);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case DEF_SMS_REQ:
                String currentDefault = Sms.getDefaultSmsPackage(this);
                boolean isDefault = selectedApp.packageName.equals(currentDefault);

                String msg = selectedApp.appName + (isDefault ?
                    " successfully set as default" :
                    " not set as default");

                Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();

                break;
            ...
        }
    }

public class AppsDialog extends Dialog
    implements OnItemClickListener {

    public interface OnAppSelectedListener {
        public void onAppSelected(AppInfo selectedApp);
    }

    private final Context context;
    private final List<AppInfo> apps;

    public AppsDialog(Context context, List<AppInfo> apps) {
        super(context);

        if (!(context instanceof OnAppSelectedListener)) {
            throw new IllegalArgumentException(
                "Activity must implement OnAppSelectedListener interface");
        }

        this.context = context;
        this.apps = apps;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setTitle("Select default SMS app");

        final ListView listView = new ListView(context);
        listView.setAdapter(new AppsAdapter(context, apps));
        listView.setOnItemClickListener(this);
        setContentView(listView);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        ((OnAppSelectedListener) context).onAppSelected(apps.get(position));
        dismiss();
    }

    private class AppsAdapter extends ArrayAdapter<AppInfo> {
        public AppsAdapter(Context context, List<AppInfo> list) {
            super(context, R.layout.list_item, R.id.text, list);
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            final AppInfo item = getItem(position);

            View v = super.getView(position, convertView, parent); 
            ((ImageView) v.findViewById(R.id.icon)).setImageDrawable(item.icon);

            return v;
        }
    }
}

AppsDialog
类创建可用默认值的一个简单的
ListView
，并通过界面将选择返回到
活动

public class MainActivity extends Activity
    implements AppsDialog.OnAppSelectedListener {
    ...

    private static final int DEF_SMS_REQ = 0;
    private AppInfo selectedApp;

    private void selectDefaultSmsPackage() {
        final List<ResolveInfo> receivers = getPackageManager().
            queryBroadcastReceivers(new Intent(Sms.Intents.SMS_DELIVER_ACTION), 0);

        final ArrayList<AppInfo> apps = new ArrayList<>();
        for (ResolveInfo info : receivers) {
            final String packageName = info.activityInfo.packageName;

            if (!packageName.equals(getPackageName())) {
                final String appName = getPackageManager()
                    .getApplicationLabel(info.activityInfo.applicationInfo)
                    .toString();
                final Drawable icon = getPackageManager()
                    .getApplicationIcon(info.activityInfo.applicationInfo);

                apps.add(new AppInfo(packageName, appName, icon));
            }
        }

        Collections.sort(apps, new Comparator<AppInfo>() {
                @Override
                public int compare(AppInfo app1, AppInfo app2) {
                    return app1.appName.compareTo(app2.appName);
                }
            }
        );

        new AppsDialog(this, apps).show();
    }

    @Override
    public void onAppSelected(AppInfo selectedApp) {
        this.selectedApp = selectedApp;

        Intent intent = new Intent(Sms.Intents.ACTION_CHANGE_DEFAULT);
        intent.putExtra(Sms.Intents.EXTRA_PACKAGE_NAME, selectedApp.packageName);
        startActivityForResult(intent, DEF_SMS_REQ);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case DEF_SMS_REQ:
                String currentDefault = Sms.getDefaultSmsPackage(this);
                boolean isDefault = selectedApp.packageName.equals(currentDefault);

                String msg = selectedApp.appName + (isDefault ?
                    " successfully set as default" :
                    " not set as default");

                Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();

                break;
            ...
        }
    }

public class AppsDialog extends Dialog
    implements OnItemClickListener {

    public interface OnAppSelectedListener {
        public void onAppSelected(AppInfo selectedApp);
    }

    private final Context context;
    private final List<AppInfo> apps;

    public AppsDialog(Context context, List<AppInfo> apps) {
        super(context);

        if (!(context instanceof OnAppSelectedListener)) {
            throw new IllegalArgumentException(
                "Activity must implement OnAppSelectedListener interface");
        }

        this.context = context;
        this.apps = apps;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setTitle("Select default SMS app");

        final ListView listView = new ListView(context);
        listView.setAdapter(new AppsAdapter(context, apps));
        listView.setOnItemClickListener(this);
        setContentView(listView);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        ((OnAppSelectedListener) context).onAppSelected(apps.get(position));
        dismiss();
    }

    private class AppsAdapter extends ArrayAdapter<AppInfo> {
        public AppsAdapter(Context context, List<AppInfo> list) {
            super(context, R.layout.list_item, R.id.text, list);
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            final AppInfo item = getItem(position);

            View v = super.getView(position, convertView, parent); 
            ((ImageView) v.findViewById(R.id.icon)).setImageDrawable(item.icon);

            return v;
        }
    }
}

“经典短信应用”是指本机短信应用吗？谷歌Play商店中的另一个短信应用。