Question

在我的应用程序中，当您单击图像时，它将移动到另一个布局但问题是

因为我添加了SecondActivity并在那里添加了一些方法，所以有一条消息来了＃34;不幸的是我的应用程序已经弯曲了＃34; 我知道有很多类似的问题，但不幸的是它不适用于我。

这是MainActivity

    package com.Anwaar.Hashem;

    import android.content.SharedPreferences;
    import android.os.Bundle;
    import android.support.design.widget.FloatingActionButton;
   import android.support.design.widget.Snackbar;
   import android.view.View;
   import android.support.design.widget.NavigationView;
   import android.support.v4.view.GravityCompat;
   import android.support.v4.widget.DrawerLayout;
   import android.support.v7.app.ActionBarDrawerToggle;
   import android.support.v7.app.AppCompatActivity;
   import android.support.v7.widget.Toolbar;
   import android.view.Menu;
   import android.view.MenuItem;
   import android.view.View.OnClickListener;
   import android.view.ViewStub;
   import android.widget.AdapterView;
   import android.widget.GridView;
   import android.widget.ListView;
   import android.widget.Toast;
   import android.content.Intent;
   import java.util.ArrayList;
   import java.util.List;
   import android.app.Activity;
    public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {



private ViewStub stubGrid;
private ViewStub stubList;
private ListView listView;
private GridView gridView;
public ListViewAdapter listViewAdapter;
public GridViewAdapter gridViewAdapter;
private List<Product> productList;
private int currentViewMode = 0;

static final int VIEW_MODE_LISTVIEW = 0;
static final int VIEW_MODE_GRIDVIEW = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    stubList = (ViewStub) findViewById(R.id.stub_list);
    stubGrid = (ViewStub) findViewById(R.id.stub_grid);

    //Inflate ViewStub before get view

    stubList.inflate();
    stubGrid.inflate();

    listView = (ListView) findViewById(R.id.myListView);
    gridView = (GridView) findViewById(R.id.myGridView);

    //get list of product
    getProductList();
    gridView.setOnClickListener((OnClickListener) this);

    //Get current view mode in share reference
    SharedPreferences sharedPreferences = getSharedPreferences("ViewMode", 
 MODE_PRIVATE);
    currentViewMode = sharedPreferences.getInt("currentViewMode", 
 VIEW_MODE_LISTVIEW);//Default is view listview
    //Register item lick
    listView.setOnItemClickListener(onItemClick);
    gridView.setOnItemClickListener(onItemClick);

    switchView();




    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", 
Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, 
 R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) 
 findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
}



private void switchView() {

    if(VIEW_MODE_LISTVIEW == currentViewMode) {
        //Display listview
        stubList.setVisibility(View.VISIBLE);
        //Hide gridview
        stubGrid.setVisibility(View.GONE);
    } else {
        //Hide listview
        stubList.setVisibility(View.GONE);
        //Display gridview
        stubGrid.setVisibility(View.VISIBLE);
    }
    setAdapters();
 }


private void setAdapters() {
    if(VIEW_MODE_LISTVIEW == currentViewMode) {
        listViewAdapter = new ListViewAdapter(this, R.layout.list_item, 
 productList);
        listView.setAdapter(listViewAdapter);
    } else {
        gridViewAdapter = new GridViewAdapter(this, R.layout.grid_item, 
 productList);
        gridView.setAdapter(gridViewAdapter);
    }
}

public List<Product> getProductList() {
    //pseudo code to get product, replace your code to get real product here
    productList = new ArrayList<>();
    productList.add(new Product(R.drawable.ii1, " Story Name", "This is 
 description 1"));
    productList.add(new Product(R.drawable.i2, "Story Name", "This is 
 description 2"));
    productList.add(new Product(R.drawable.i3, "Story Name", "This is 
 description 3"));
    productList.add(new Product(R.drawable.i4, "Story Name", "This is 
 description 4"));
    productList.add(new Product(R.drawable.i5, "Story Name", "This is 
 description 5"));
    productList.add(new Product(R.drawable.i6, "Story Name", "This is description 
6"));

    productList.add(new Product(R.drawable.i8, "Story Name", "This is 
  description 8"));
    productList.add(new Product(R.drawable.i9, "Story Name", "This is 
  description 9"));
    productList.add(new Product(R.drawable.i10, "Story Name", "This is 
  description 10"));

    return productList;
 }

  AdapterView.OnItemClickListener onItemClick = new 
  AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, 
    long id) {
        //Do any thing when user click to item
        Toast.makeText(getApplicationContext(), 
   productList.get(position).getTitle() + " - "
                + productList.get(position).getDescription(), 
      Toast.LENGTH_SHORT).show();


    }
  };





 @Override
 public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
  } 



 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;

 }

 public void onClick(View v){
    Intent i= new Intent(MainActivity.this,SecondActivity.class);
    startActivity(i);
    setContentView(R.layout.activity_second);
  }



  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.action_settings:
            if(VIEW_MODE_LISTVIEW == currentViewMode) {
                currentViewMode = VIEW_MODE_GRIDVIEW;
            } else {
                currentViewMode = VIEW_MODE_LISTVIEW;
            }
            //Switch view
            switchView();
            //Save view mode in share reference
            SharedPreferences sharedPreferences = 
            getSharedPreferences("ViewMode", MODE_PRIVATE);
            SharedPreferences.Editor editor = sharedPreferences.edit();
            editor.putInt("currentViewMode", currentViewMode);
            editor.commit();

            break;
    }
    return true;
  }



 @SuppressWarnings("StatementWithEmptyBody")
 @Override
 public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    if (id == R.id.nav_camera) {
        // Handle the camera action
    } else if (id == R.id.nav_gallery) {

    } else if (id == R.id.nav_slideshow) {

    } else if (id == R.id.nav_manage) {

    } else if (id == R.id.nav_share) {

    } else if (id == R.id.nav_send) {

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
  }
  }

这是SecondActivity

     package com.Anwaar.Hashem;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.Toolbar;
import android.widget.ImageView;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.view.Menu;
 public class SecondActivity extends Activity  {

Toolbar mToolbar;
ImageView sample;

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

    mToolbar = findViewById(R.id.toolbar);
    sample  = findViewById(R.id.imageView);

    Bundle bundle = getIntent().getExtras();

    if (bundle != null) {
        mToolbar.setTitle(bundle.getString("title"));

        if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.ii1));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")){
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i2));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i3));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i4));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i5));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i6));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i8));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i9));

        }

        else if (mToolbar.getTitle().toString().equalsIgnoreCase("Story Name")) {
            sample .setImageDrawable(ContextCompat.getDrawable(SecondActivity.this, R.drawable.i10));

        }


    }
}

 }

这是清单

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

 <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="com.Anwaar.Hashem.MainActivity"
        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="com.Anwaar.Hashem.SecondActivity">
         </activity>



</application>

 </manifest>

我也有GridViewAdapter，ListViewAdapter和Product java文件

Answer 1

当您开始第二个活动时，您不应该在第一个

中设置内容视图

^(?P<hop>\d+)?[\t *]*(?:\[AS(?<ASN>\d*)\])?[\t ]+(?<hostname>[\w\.]+)[\t ]+\((?<ip>[\d+\.]+)\)[\t ]+(?<times>.*?)[\t ]*$

}

此外，我认为您应该将此代码移至您班级的public void onClick(View v){ Intent i= new Intent(MainActivity.this,SecondActivity.class); startActivity(i); /*---------- setContentView(R.layout.activity_second);---*/方法

此行导致问题。 onItemClick()

删除该行

并将此gridView.setOnClickListener((OnClickListener) this);替换为

gridView.setOnItemClickListener(onItemClick);

Answer 2

setContentView(R.layout.activity_second);

这是错误。你永远不应该这样做。如果您这样做意味着您将第一个Activity的布局内容更改为第二个Activity的布局内容，但这不是您想要做的。您想要更改活动。

当您转到新活动时，它会调用初始化内容视图的onCreate()方法。一旦完成，你不应该改变，直到绝对必要。

如果你只是写这个， Intent i= new Intent(MainActivity.this,SecondActivity.class); startActivity(i);它会完美运作。

在android studio中停止我的应用程序当我添加第二个活动时

2 个答案: