Android 无法移动到主活动

问题：我想有目的地移动MainActivity，但我应用了LoginActivity作为主显示，如何在MainActivity不是主显示时移动到MainActivity

我想我把事情搞砸了。仍然需要帮助

LoginActivity.java

}

主要活动

}

AndroidManifest.xml

activity_main.xml

谢谢你帮助我，帮助你意味着很多

试试这个

你的舱单

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.teltics.projectnew">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".activities.LoginActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".activities.MainActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.MainActivity"
        >
    </activity>
    <activity
        android:name=".activities.RegisterActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="Register"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.LoginActivity">
    </activity>
    <activity
        android:name=".activities.ProfileActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>

public class MainActivity extends AppCompatActivity {

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

    startActivity(LoginActivity.getIntent(this));
}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.teltics.projectnew">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".activities.MainActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".activities.LoginActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.LoginActivity"
        >
    </activity>
    <activity
        android:name=".activities.RegisterActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="Register"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.LoginActivity">
    </activity>
    <activity
        android:name=".activities.ProfileActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/toolbar_background_color"
    android:orientation="horizontal"
    android:gravity="center">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_margin="@dimen/default_component_margin"
        android:adjustViewBounds="true"
        android:src="@drawable/ic_toolbar_logo"
        />

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@drawable/ic_default_background"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:padding="@dimen/default_component_padding">

    <EditText
        android:id="@+id/et_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/default_component_margin_very_big"
        android:inputType="textEmailAddress"
        android:textColorHint="#EEEEEE"
        android:textColor="@color/default_text_color_inverse"
        android:background="#77000000"
        android:hint="@string/text_view_email_hint"
        />

    <EditText
        android:id="@+id/et_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/default_component_margin"
        android:inputType="textPassword"
        android:textColorHint="#EEEEEE"
        android:textColor="@color/default_text_color_inverse"
        android:background="#77000000"
        android:hint="@string/text_view_password_hint"
        />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/default_component_margin"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_register"
            android:layout_width="0dp"
            android:layout_weight="0.5"
            android:layout_height="wrap_content"
            android:background="@color/white"
            android:textColor="@color/black"
            android:text="@string/button_register_text"
            />

        <View
            android:layout_width="@dimen/default_component_margin"
            android:layout_height="1dp"
            />

        <Button
            android:id="@+id/btn_login"
            android:layout_width="0dp"
            android:layout_weight="0.5"
            android:layout_height="wrap_content"
            android:background="@color/white"
            android:textColor="@color/black"
            android:text="@string/button_login_text"
            />

    </LinearLayout>

    <Button
        android:id="@+id/btn_forgot_password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/default_component_margin"
        android:layout_gravity="center_horizontal"
        android:background="@color/white"
        android:textColor="@color/black"
        android:text="@string/button_forgot_password_text"
        />

</LinearLayout>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.teltics.projectnew">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".activities.LoginActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".activities.MainActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.MainActivity"
        >
    </activity>
    <activity
        android:name=".activities.RegisterActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="Register"
        android:theme="@style/AppTheme.NoActionBar"
        android:parentActivityName=".activities.LoginActivity">
    </activity>
    <activity
        android:name=".activities.ProfileActivity"
        android:screenOrientation="portrait"
        android:windowSoftInputMode="adjustResize"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>