Java 按下按钮后，活动将关闭

在这里，我试图在按钮单击事件上从MainActivity打开一个名为LevelActivity的活动，但当我试图打开我的LevelActivity时，它会将我抛出应用程序之外。下面给出了XML和JAVA文件

My LevelActivity.java

ActivityMain.java的代码

这是我的主要活动，正如我前面所说的，我希望从主要活动导航到级别活动

这是我的LevelActivity的XML文件

请帮助我解决这个问题，如果你想要任何其他文件，如cat日志，请提及

下面是我在调试控制台上发现的内容 希望这会有所帮助

E/AndroidRuntime: FATAL EXCEPTION: main
Process: cheezycode.com.justmaths, PID: 1634
java.lang.RuntimeException: Unable to start activity ComponentInfo{cheezycode.com.justmaths/cheezycode.com.justmaths.LevelActivity}: android.view.InflateException: Binary XML file line #19: Can't convert to dimension: type=0x12
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2487)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2547)
    at android.app.ActivityThread.access$1100(ActivityThread.java:151)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1398)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:157)
    at android.app.ActivityThread.main(ActivityThread.java:5604)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652)
 Caused by: android.view.InflateException: Binary XML file line #19: Can't convert to dimension: type=0x12
    at android.view.LayoutInflater.inflate(LayoutInflater.java:543)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
    at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:256)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:109)
    at cheezycode.com.justmaths.LevelActivity.onCreate(LevelActivity.java:14)
    at android.app.Activity.performCreate(Activity.java:6358)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2440)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2547) 
    at android.app.ActivityThread.access$1100(ActivityThread.java:151) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1398) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:157) 
    at android.app.ActivityThread.main(ActivityThread.java:5604) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:774) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652) 
 Caused by: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x12
    at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:668)
    at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:7086)
    at android.widget.RelativeLayout$LayoutParams.<init>(RelativeLayout.java:1241)
    at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:1087)
    at 
  android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:84)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:841)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:802)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:519)

---

这就是错误的地方：

android:layout_marginLeft="@+id/btnEasy"

边距应该是数字，而不是视图

如果要将其放置在该视图旁边，请使用：

android:layout_toLeftOf="@id/btnEasy"

---

此外，每次引用现有视图时，不应包含+符号。只有当您在id属性上命名一个新视图时，才会出现这种情况。

最后，在弄得如此混乱之后，我只需重新编写所有代码，并找出一些错误，然后使用此代码在LevelActivity中进行更改

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class LevelActivity extends AppCompatActivity {

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

    Button btn1 = (Button) findViewById(R.id.button1);
    Button btn2 = (Button) findViewById(R.id.button2);
    Button btn3 = (Button) findViewById(R.id.button3);
    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 120;
          //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

           // myIntent.putExtra("varLive", Live);
        }
    });

    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 60;
            //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

            // myIntent.putExtra("varLive", Live);
        }
    });

    btn3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 40;
            //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

            // myIntent.putExtra("varLive", Live);
        }
    });
}
}

---

如果我们能看到您的日志会有帮助吗？您是否在清单中声明了LevelActivity？是的，我在清单中声明了LevelActivity请不要让人们猜测，添加您的日志，以便我们提供更多信息answers@NikosHidalgo好的，我会的！查看我更新的帖子，你需要在不同的地方更改你的代码

android:layout_marginLeft="@+id/btnEasy"

android:layout_toLeftOf="@id/btnEasy"

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class LevelActivity extends AppCompatActivity {

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

    Button btn1 = (Button) findViewById(R.id.button1);
    Button btn2 = (Button) findViewById(R.id.button2);
    Button btn3 = (Button) findViewById(R.id.button3);
    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 120;
          //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

           // myIntent.putExtra("varLive", Live);
        }
    });

    btn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 60;
            //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

            // myIntent.putExtra("varLive", Live);
        }
    });

    btn3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int seconds = 40;
            //  int Live = 10;
            Intent myIntent = new Intent(LevelActivity.this, GameActivity.class);
            myIntent.putExtra("secondA", seconds);
            startActivity(myIntent);

            // myIntent.putExtra("varLive", Live);
        }
    });
}
}