如何从另一个活动中启动启动器活动？

Question

I created one app with two activities when I run app It opens first launcher activity In this activity I added textView on clicking this textView second activity is opened, At the second activity again I added one textView on clicking that textView I expected to launch my first activity(Launcer activity) but this doesn't happens? Why? My Manifest file is as follows

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.adbs.abs.dhanagarmaza" >

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".LoginRegi"
            android:label="@string/app_name"
            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=".Register"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar" >
            <intent-filter>
                <action android:name="com.adbs.abs.REGISTER" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>

</manifest>

My LoginRegi(Second activity java file 'DEFAULT activity')

 protected void onCreate(Bundle registerBundle) {
        super.onCreate(registerBundle);
        setContentView(R.layout.register);

        // If user wants to login then on click "Login Me" textView open activity(LoginRegi.xml)
        loginMe = (TextView)findViewById(R.id.tvLoginMe);
        loginMe.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
                Intent openLoginRegi = new Intent("android.intent.action.MAIN");
                startActivity(openLoginRegi);
            }
        });
    }

and LoginRegi.java (First activity 'LAUNCHER activity')

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_regi);

        // On click signup textView => Open activity (register.xml)
        signUp = (TextView)findViewById(R.id.tvSignUp);
        signUp.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
                Intent openRegister = new Intent("com.adbs.abs.REGISTER");
                startActivity(openRegister);
            }
        });

    }

Answer 1

Activity 1:-

public class MainActivity extends Activity {

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

        tvOne=(TextView)findViewById(R.id.tvOne);

        tvOne.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(getApplicationContext(),Main2Activity.class);
                startActivity(intent);
            }
        });
    }


}

Activity 2:-

public class Main2Activity extends Activity {

    TextView tvTwo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        tvTwo=(TextView)findViewById(R.id.tvTwo);

        tvTwo.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent=new Intent(getApplicationContext(),MainActivity.class);
                startActivity(intent);
            }
        });
    }
}

Answer 2

Intent i =new Intent(this,MainActivity.class); startActivity(i);

Answer 3

you can post your code so we can get exact problem because .. by finish(); you can get your prevous activity back either you can do it by Intent

Answer 4

My LoginRegi(Second activity java file 'DEFAULT activity')

 protected void onCreate(Bundle registerBundle) {
        super.onCreate(registerBundle);
        setContentView(R.layout.register);

        // If user wants to login then on click "Login Me" textView open activity(LoginRegi.xml)
        loginMe = (TextView)findViewById(R.id.tvLoginMe);
        loginMe.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
                Intent openLoginRegi = new Intent(Register.this,LoginRegi.class);
                startActivity(openLoginRegi);
            }
        });
    }

and LoginRegi.java (First activity 'LAUNCHER activity')

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login_regi);

        // On click signup textView => Open activity (register.xml)
        signUp = (TextView)findViewById(R.id.tvSignUp);
        signUp.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){
                Intent openRegister = new Intent(LoginRegi.this,Register.class);
                startActivity(openRegister);
            }
        });

    }