Question

正如我所说，我得到一个错误，其中无法识别startActivity。这是代码：

AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("Deal");
builder.setMessage("Hello");
builder.setPositiveButton("Call ME", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

        Intent callIntent = new Intent(Intent.ACTION_CALL);
        callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        callIntent.setData(Uri.parse("tel:" + "528543871"));
        startActivity(callIntent);

    }
});
builder.create();
builder.show();

Answer 1

您没有创建对话框。你正在创建一个构建器。请尝试如下：

AlertDialog myDialog = new AlertDialog.Builder(this).create();
myDialog.setTitle("Deal");
myDialog.setMessage("Hello");
myDialog.setButton(DialogInterface.BUTTON_POSITIVE, "Call me", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

        Intent callIntent = new Intent(Intent.ACTION_CALL);
        callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        callIntent.setData(Uri.parse("tel:" + "528543871"));
        startActivity(callIntent);

    }
})
myDialog.show();

Answer 2

正如评论中的其他人已经指出的那样，方法startActivity需要从上下文context.startActivity()明确调用，或者如果您在活动startActivity()中调用，则需要Activity实现Context接口。在您的情况下，我认为这应该解决它（使用您已经拥有的mContext）：

AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("Deal");
builder.setMessage("Hello");
builder.setPositiveButton("Call ME", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {

    Intent callIntent = new Intent(Intent.ACTION_CALL);
    callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    callIntent.setData(Uri.parse("tel:" + "528543871"));
    mContext.startActivity(callIntent);

}
});

builder.create();
builder.show();

Answer 3

在上下文中调用方法startActivity()。当您将方法调用onClick()时，这是OnCLickListener的方法，因此该方法尚未解决。正如我在您的代码中看到的那样，您已在mContext构造函数中传递了AlertDialog.Builder，因此您也可以使用该Context变量来调用startActivity()方法。

AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("Deal");
builder.setMessage("Hello");
builder.setPositiveButton("Call ME", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

        Intent callIntent = new Intent(Intent.ACTION_CALL);
        callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        callIntent.setData(Uri.parse("tel:" + "528543871"));
        mContext.startActivity(callIntent); //Correct this line

    }
});
builder.create();
builder.show();

OR

AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
builder.setTitle("Deal");
builder.setMessage("Hello");
builder.setPositiveButton("Call ME", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {

        Intent callIntent = new Intent(Intent.ACTION_CALL);
        callIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        callIntent.setData(Uri.parse("tel:" + "528543871"));
        getActivity().startActivity(callIntent);

    }
});
builder.create();
builder.show();

无法解析方法＆＃39; startActivity（android.content.Intent）＆＃39;

3 个答案: