即使在我将其添加到AndroidManifest文件中，活动也不会启动

我不熟悉安卓系统。我读过类似的文章，但我无法解决我的问题。 我在androidManifest文件中添加了我的所有活动，但我无法使用Intent从第二个活动移动到第三个活动

这里是MainActivity.java 下面是SecondActivity.java 这里是ThirdActivity.java

package com.mobi.franchycalc；
导入java.util.Random；
导入android.os.Bundle；
导入android.app.Activity；
导入android.content.Intent；
导入android.view.Menu；
导入android.view.view；
导入android.widget.Button；
导入android.widget.TextView；
公共课第三活动扩展活动{
文本视图仪表；
按钮Goback按钮；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_第三）；
仪表=（TextView）findViewById（R.id.meter）；
goBackButton=（按钮）findViewById（R.id.goBackButton）；
goBackButton.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图arg0）{
//TODO自动生成的方法存根
Intent in=新的Intent（third活动.this，SecondActivity.class）；
星触觉（in）；
}
});
Random ran=新的Random（）；
对于（int i=0；i

试试这个

你可以检查一下

主要活动

package com.mobi.crazycalc;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainActivity extends Activity {

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

            @Override
            public void run() {
                // TODO Auto-generated method stub
                Intent in = new Intent(MainActivity.this, SecondActivity.class);
                MainActivity.this.startActivity(in);
                MainActivity.this.finish();
            }
        }, 1000);
    }


    @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;
    }

}

第二性

package com.mobi.crazycalc;

import android.content.Intent;
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.Button;
import android.widget.EditText;


public class SecondActivity extends ActionBarActivity {

    EditText name1;
    EditText name2;
    Button goButton;

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

        name1 = (EditText) findViewById(R.id.name1);
        name2 = (EditText) findViewById(R.id.name2);
        goButton = (Button) findViewById(R.id.gobutton);
        final String hisName = name1.getText().toString().trim();
        final String herName = name2.getText().toString().trim();
        goButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent in = new Intent(SecondActivity.this, ThirdActivity.class);
                in.putExtra("Result", "value");
                startActivity(in);

            }
        });

    }

    @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_second, 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);
    }
}

在第三项活动中

package com.mobi.crazycalc;

import android.content.Intent;
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.Button;
import android.widget.TextView;

import java.util.Random;


public class ThirdActivity extends ActionBarActivity {

    TextView meter;
    Button goBackButton;

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

        meter = (TextView) findViewById(R.id.meter);
        goBackButton = (Button) findViewById(R.id.gobackbutton);
        goBackButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent in = new Intent(ThirdActivity.this, SecondActivity.class);
                startActivity(in);
            }
        });
        Random ran = new Random();
        for (int i = 0; i < 100; ++i) {
            int ranNo = ran.nextInt(100);
            meter.setText(ran.toString());
        }
        Bundle bund = getIntent().getExtras();
        String res = bund.get("Result").toString();

        meter.setText(res);
    }

    @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_third, 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);
    }
}

package com.mobi.franchycalc；
导入android.content.Intent；
导入android.support.v7.app.ActionBarActivity；
导入android.os.Bundle；
导入android.view.Menu；
导入android.view.MenuItem；
导入android.view.view；
导入android.widget.Button；
导入android.widget.TextView；
导入java.util.Random；
公共类第三个活动扩展了ActionBarActivity{
文本视图仪表；
按钮Goback按钮；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_第三）；
仪表=（TextView）findViewById（R.id.meter）；
goBackButton=（按钮）findViewById（R.id.goBackButton）；
goBackButton.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图arg0）{
//TODO自动生成的方法存根
Intent in=新的Intent（ThirdActivity.this，SecondActivity.class）；
星触觉（in）；
}
});
Random ran=新的Random（）；
对于（int i=0；i<100；++i）{
int ranNo=ran.nextInt（100）；
meter.setText（ran.toString（））；
}
Bundle bund=getIntent（）.getExtras（）；
字符串res=bund.get（“结果”）.toString（）；
meter.setText（res）；
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//为菜单充气；这会将项目添加到操作栏（如果存在）。
getMenuInflater（）.充气（R.menu.menu\u第三个菜单）；
返回true；
}
@凌驾
公共布尔值onOptionsItemSelected（菜单项项）{
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击，只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId（）；
//noinspection SimplifiableIf语句
if（id==R.id.action\u设置）{
返回true；
}
返回super.onOptionsItemSelected（项目）；
}
}

在menifest文件中

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

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SecondActivity"
            android:label="@string/title_activity_second" >
        </activity>
        <activity
            android:name=".ThirdActivity"
            android:label="@string/title_activity_third" >
        </activity>
    </application>

</manifest>

---

希望它能对您有所帮助。

您能给我一个

R.layout.activity\u second

的代码吗？谢谢！在没有

MainActivity.this.finish（）；

的情况下尝试一下吗？您遇到了什么错误，请在您声明意图的goButton中尝试一下这个方法，，，，，Intent.setFlags（Intent.FLAG\u activity\u CLEAR\u TOP）；我已将活动_second.xmlthis.finish（）；我已更新答案检查此项。如果您有任何问题，请告诉我。

RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#e52850"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".SecondActivity" >

<EditText
    android:id="@+id/name1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="57dp"
    android:ems="10"
    android:hint="@string/name1Edittext"
    android:textColor="@color/almond" >

    <requestFocus />
</EditText>

<Button
    android:id="@+id/gobutton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/name2"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="30dp"
    android:background="@android:color/transparent"
    android:text="@string/buttontext"
    android:textColor="@color/aeroBlue" />

<EditText
    android:id="@+id/name2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/name1"
    android:layout_below="@+id/name1"
    android:layout_marginTop="41dp"
    android:ems="10"
    android:hint="@string/name2Edittext"
    android:textColor="@color/almond" />

</RelativeLayout>

package com.mobi.crazycalc;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;


import android.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainActivity extends Activity {

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

            @Override
            public void run() {
                // TODO Auto-generated method stub
                Intent in = new Intent(MainActivity.this, SecondActivity.class);
                MainActivity.this.startActivity(in);
                MainActivity.this.finish();
            }
        }, 1000);
    }


    @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;
    }

}

package com.mobi.crazycalc;

import android.content.Intent;
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.Button;
import android.widget.EditText;


public class SecondActivity extends ActionBarActivity {

    EditText name1;
    EditText name2;
    Button goButton;

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

        name1 = (EditText) findViewById(R.id.name1);
        name2 = (EditText) findViewById(R.id.name2);
        goButton = (Button) findViewById(R.id.gobutton);
        final String hisName = name1.getText().toString().trim();
        final String herName = name2.getText().toString().trim();
        goButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent in = new Intent(SecondActivity.this, ThirdActivity.class);
                in.putExtra("Result", "value");
                startActivity(in);

            }
        });

    }

    @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_second, 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);
    }
}

package com.mobi.crazycalc;

import android.content.Intent;
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.Button;
import android.widget.TextView;

import java.util.Random;


public class ThirdActivity extends ActionBarActivity {

    TextView meter;
    Button goBackButton;

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

        meter = (TextView) findViewById(R.id.meter);
        goBackButton = (Button) findViewById(R.id.gobackbutton);
        goBackButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Intent in = new Intent(ThirdActivity.this, SecondActivity.class);
                startActivity(in);
            }
        });
        Random ran = new Random();
        for (int i = 0; i < 100; ++i) {
            int ranNo = ran.nextInt(100);
            meter.setText(ran.toString());
        }
        Bundle bund = getIntent().getExtras();
        String res = bund.get("Result").toString();

        meter.setText(res);
    }

    @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_third, 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);
    }
}

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

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SecondActivity"
            android:label="@string/title_activity_second" >
        </activity>
        <activity
            android:name=".ThirdActivity"
            android:label="@string/title_activity_third" >
        </activity>
    </application>

</manifest>