Question

如何在主要活动的背面退出应用程序？我正在使用此代码，但它完成了主要活动，并显示了来自后栈的其他活动。

@Override
    public void onBackPressed() {
        finish();
    }

Answer 1

我尝试了这个并且它对我的工作非常好，因为我正在开发应用程序，一旦会话过期，用户只能看到少量视图并保持隐藏状态。

    @Override
    public void onBackPressed() {
        moveTaskToBack(true);
    }

Answer 2

您可以使用

public void setListViewHeightBasedOnChildren(StaggeredGridView staggeredGridView, int columns) { SampleAdapter listAdapter = (SampleAdapter) staggeredGridView.getAdapter(); if (listAdapter == null) { // pre-condition return; } int totalHeight = 0; int items = listAdapter.getCount(); int rows = 0; View listItem = listAdapter.getView(0, null, staggeredGridView); listItem.measure(0, 0); totalHeight = listItem.getMeasuredHeight(); float x = 1; if( items > columns ){ x = items/columns; rows = (int) (x + 1); totalHeight *= rows; } ViewGroup.LayoutParams params = gridView.getLayoutParams(); params.height = totalHeight; gridView.setLayoutParams(params); } 在此活动标签下的清单中

android:noHistory="true"

Answer 3

你也可以试试这个，

@Override
    public void onBackPressed() {
       int pid = android.os.Process.myPid();
       android.os.Process.killProcess(pid);    
}

Answer 4

试试这个

@override
public void onBackPressed(){
Intent a = new Intent(Intent.ACTION_MAIN);
a.addCategory(Intent.CATEGORY_HOME);
a.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(a);
}

Answer 5

你可以尝试这个：

@Override
    public void onBackPressed() {
        // TODO Auto-generated method stub

        new AlertDialog.Builder(Activityname.this)
        .setTitle("Title")
        .setMessage("Do you really want to exit?")
        .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) { 
                ActivityCompat.finishAffinity(Activityname.this);
                finish();   
            }
        })
        .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) { 
                dialog.dismiss();
            }
        })
        .setIcon(android.R.drawable.ic_dialog_alert)
        .show();

    }

希望它能解决你的问题

Answer 6

Already asked。最受欢迎的答案：

getActivity().finish();
System.exit(0);

Answer 7

您可以尝试在onBackPressed中添加此代码：

getActivity().finish();
System.exit(0);

Answer 8

@Override
public void onBackPressed() {

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to Exit ?")
            .setCancelable(false)
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    moveTaskToBack(true);
                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    dialogInterface.cancel();
                }
            });
    AlertDialog alertDialog = builder.create();
    alertDialog.show();
}

Answer 9

试试这个，

Intent intent = new Intent(UserProfile.this, Login.class)
                            .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
finish();

Answer 10

试 public void onBackPressed() { finish(); Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); finish(); }

使用finish（）;从一个活动迁移到另一个活动

Android如何关闭正在运行的应用程序？

10 个答案: